chore(deps)(deps): bump com.google.genai:google-genai (#206)

Bumps [com.google.genai:google-genai](https://github.com/googleapis/java-genai) from 1.55.0 to 1.56.0.
- [Release notes](https://github.com/googleapis/java-genai/releases)
- [Changelog](https://github.com/googleapis/java-genai/blob/main/CHANGELOG.md)
- [Commits](googleapis/java-genai@v1.55.0...v1.56.0)

---
updated-dependencies:
- dependency-name: com.google.genai:google-genai
  dependency-version: 1.56.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

plugins/google-genai/pom.xml

@@ -49,7 +49,7 @@
         <dependency>
             <groupId>com.google.genai</groupId>
             <artifactId>google-genai</artifactId>
-            <version>1.55.0</version>
+            <version>1.56.0</version>
         </dependency>
 
         <!-- JSON -->