Bump com.openai:openai-java from 2.8.1 to 2.9.0

Bumps [com.openai:openai-java](https://github.com/openai/openai-java) from 2.8.1 to 2.9.0.
- [Release notes](https://github.com/openai/openai-java/releases)
- [Changelog](https://github.com/openai/openai-java/blob/main/CHANGELOG.md)
- [Commits](openai/openai-java@v2.8.1...v2.9.0)

---
updated-dependencies:
- dependency-name: com.openai:openai-java
  dependency-version: 2.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -68,7 +68,7 @@
         <dependency>
             <groupId>com.openai</groupId>
             <artifactId>openai-java</artifactId>
-            <version>2.8.1</version>
+            <version>2.9.0</version>
         </dependency>
 
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