Bump com.google.api:gax-httpjson in /plugins/repository-gcs

Bumps com.google.api:gax-httpjson from 0.103.1 to 2.30.0.

---
updated-dependencies:
- dependency-name: com.google.api:gax-httpjson
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

plugins/repository-gcs/build.gradle

@@ -54,7 +54,7 @@ versions << [
 dependencies {
   api 'com.google.api:api-common:1.8.1'
   api 'com.google.api:gax:2.27.0'
-  api 'com.google.api:gax-httpjson:0.103.1'
+  api 'com.google.api:gax-httpjson:2.30.0'
 
   api 'com.google.apis:google-api-services-storage:v1-rev20230617-2.0.0'