chore(deps): Bump com.google.genai:google-genai from 1.50.0 to 1.51.0 (#22741)

Bumps [com.google.genai:google-genai](https://github.com/googleapis/java-genai) from 1.50.0 to 1.51.0.
- [Release notes](https://github.com/googleapis/java-genai/releases)
- [Changelog](https://github.com/googleapis/java-genai/blob/main/CHANGELOG.md)
- [Commits](googleapis/java-genai@v1.50.0...v1.51.0)

---
updated-dependencies:
- dependency-name: com.google.genai:google-genai
  dependency-version: 1.51.0
  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]

parent/pom.xml

@@ -225,7 +225,7 @@
         <google-cloud-vision-version>3.89.0</google-cloud-vision-version>
         <google-cloud-speech-version>4.86.0</google-cloud-speech-version>
         <google-cloud-texttospeech-version>2.92.0</google-cloud-texttospeech-version>
-        <google-genai-version>1.50.0</google-genai-version>
+        <google-genai-version>1.51.0</google-genai-version>
         <graaljs-version>25.0.3</graaljs-version>
         <graphql-java-version>26.0</graphql-java-version>
         <greenmail-version>2.1.8</greenmail-version>