chore: regenerate apihub client (googleapis#32653)

Generated in GitHub action: https://togithub.com/googleapis/googleapis/google-api-java-client-services/actions/workflows/codegen.yaml

Author: yoshi-code-bot

clients/google-api-services-apihub/v1/2.0.0/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-apihub</artifactId>
-      <version>v1-rev20260819-2.0.0</version>
+      <version>v1-rev20260831-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-apihub:v1-rev20260819-2.0.0'
+  implementation 'com.google.apis:google-api-services-apihub:v1-rev20260831-2.0.0'
 }
 ```
 

clients/google-api-services-apihub/v1/2.0.0/com/google/api/services/apihub/v1/model/GoogleCloudApihubV1Addon.java

@@ -29,6 +29,21 @@
 @SuppressWarnings("javadoc")
 public final class GoogleCloudApihubV1Addon extends com.google.api.client.json.GenericJson {
 
+  /**
+   * Output only. The Vertex AI region where the BoostSpec Gemini model calls run for this API Hub
+   * instance. Populated only for the SpecGen addon (`system-spec-generation`); other addons leave
+   * this field empty. `gemini-2.5-flash` is not available in every API Hub region, so the effective
+   * region may differ from the API Hub instance's own region. The value follows these semantics: -
+   * `""`: BoostSpec is disabled in this region (the addon is not SpecGen, or the API Hub instance
+   * region has no configured Gemini endpoint or fallback). - Equal to the API Hub instance region:
+   * BoostSpec calls run in-region. - Differs from the API Hub instance region: BoostSpec calls run
+   * in the specified fallback region. Callers rendering this field can derive the three display
+   * states from this single field combined with the API Hub instance region.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.lang.String boostSpecGeminiRegionId;
+
   /**
    * Required. The configuration of the addon.
    * The value may be {@code null}.
@@ -87,6 +102,39 @@ public final class GoogleCloudApihubV1Addon extends com.google.api.client.json.G
   @com.google.api.client.util.Key
   private String updateTime;
 
+  /**
+   * Output only. The Vertex AI region where the BoostSpec Gemini model calls run for this API Hub
+   * instance. Populated only for the SpecGen addon (`system-spec-generation`); other addons leave
+   * this field empty. `gemini-2.5-flash` is not available in every API Hub region, so the effective
+   * region may differ from the API Hub instance's own region. The value follows these semantics: -
+   * `""`: BoostSpec is disabled in this region (the addon is not SpecGen, or the API Hub instance
+   * region has no configured Gemini endpoint or fallback). - Equal to the API Hub instance region:
+   * BoostSpec calls run in-region. - Differs from the API Hub instance region: BoostSpec calls run
+   * in the specified fallback region. Callers rendering this field can derive the three display
+   * states from this single field combined with the API Hub instance region.
+   * @return value or {@code null} for none
+   */
+  public java.lang.String getBoostSpecGeminiRegionId() {
+    return boostSpecGeminiRegionId;
+  }
+
+  /**
+   * Output only. The Vertex AI region where the BoostSpec Gemini model calls run for this API Hub
+   * instance. Populated only for the SpecGen addon (`system-spec-generation`); other addons leave
+   * this field empty. `gemini-2.5-flash` is not available in every API Hub region, so the effective
+   * region may differ from the API Hub instance's own region. The value follows these semantics: -
+   * `""`: BoostSpec is disabled in this region (the addon is not SpecGen, or the API Hub instance
+   * region has no configured Gemini endpoint or fallback). - Equal to the API Hub instance region:
+   * BoostSpec calls run in-region. - Differs from the API Hub instance region: BoostSpec calls run
+   * in the specified fallback region. Callers rendering this field can derive the three display
+   * states from this single field combined with the API Hub instance region.
+   * @param boostSpecGeminiRegionId boostSpecGeminiRegionId or {@code null} for none
+   */
+  public GoogleCloudApihubV1Addon setBoostSpecGeminiRegionId(java.lang.String boostSpecGeminiRegionId) {
+    this.boostSpecGeminiRegionId = boostSpecGeminiRegionId;
+    return this;
+  }
+
   /**
    * Required. The configuration of the addon.
    * @return value or {@code null} for none

clients/google-api-services-apihub/v1/2.0.0/pom.xml

@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-apihub</artifactId>
-  <version>v1-rev20260819-2.0.0</version>
-  <name>API hub API v1-rev20260819-2.0.0</name>
+  <version>v1-rev20260831-2.0.0</version>
+  <name>API hub API v1-rev20260831-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>

clients/google-api-services-apihub/v1/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-apihub</artifactId>
-      <version>v1-rev20260819-2.0.0</version>
+      <version>v1-rev20260831-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-apihub:v1-rev20260819-2.0.0'
+  implementation 'com.google.apis:google-api-services-apihub:v1-rev20260831-2.0.0'
 }
 ```