chore(deps-dev): bump com.google.genai:google-genai

Bumps [com.google.genai:google-genai](https://github.com/googleapis/java-genai) from 1.37.0 to 1.38.0.
- [Release notes](https://github.com/googleapis/java-genai/releases)
- [Changelog](https://github.com/googleapis/java-genai/blob/main/CHANGELOG.md)
- [Commits](googleapis/java-genai@v1.37.0...v1.38.0)

---
updated-dependencies:
- dependency-name: com.google.genai:google-genai
  dependency-version: 1.38.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

agentscope-dependencies-bom/pom.xml

@@ -74,7 +74,7 @@
         <mockito.version>5.21.0</mockito.version>
         <junit-jupiter.version>6.0.2</junit-jupiter.version>
         <guava.version>33.5.0-jre</guava.version>
-        <google-genai.version>1.37.0</google-genai.version>
+        <google-genai.version>1.38.0</google-genai.version>
         <dashscope-sdk-java.version>2.22.9</dashscope-sdk-java.version>
         <bailian.version>2.8.1</bailian.version>
         <openai-java.version>4.17.0</openai-java.version>