update the build-plugins

(cherry picked from commit 9a135da)

Author: hauner

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ processor = "2026.3.2"
 kotlin = "2.3.20"
 target-jdk = "11"
 build-jdk = "17"
-build-plugins = "2026.3"
+build-plugins = "2026.4"
 
 api = "2024.2"
 base = "2026.3.1"