Merge pull request #271 from openapi-processor/dependabot/gradle/io.openapiprocessor-build-plugins-2026.4

build(deps): bump io.openapiprocessor:build-plugins from 2026.3 to 2026.4

Author: hauner

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ openapiparser = "2026.3-SNAPSHOT"
 
 build-jdk = "17"
 test-jdk = "17"
-build-plugins = "2026.3"
+build-plugins = "2026.4"
 
 # using the embedded kotlin version of Gradle to avoid mixed versions
 kotlin = "2.3.0"