chore: [DevOps] bump org.springframework.ai:spring-ai-bom

Bumps the production-major group with 1 update in the / directory: [org.springframework.ai:spring-ai-bom](https://github.com/spring-projects/spring-ai).


Updates `org.springframework.ai:spring-ai-bom` from 1.1.8 to 2.0.0
- [Release notes](https://github.com/spring-projects/spring-ai/releases)
- [Commits](spring-projects/spring-ai@v1.1.8...v2.0.0)

---
updated-dependencies:
- dependency-name: org.springframework.ai:spring-ai-bom
  dependency-version: 2.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-major
...

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

Author: dependabot[bot]

pom.xml

@@ -65,7 +65,7 @@
     <checkstyle.version>13.6.0</checkstyle.version>
     <system-stubs.version>2.1.3</system-stubs.version>
     <surefire.version>3.5.6</surefire.version>
-    <spring-ai.version>1.1.8</spring-ai.version>
+    <spring-ai.version>2.0.0</spring-ai.version>
     <reactor-core.version>3.8.6</reactor-core.version>
     <dotenv-java.version>3.2.0</dotenv-java.version>
     <mockito.version>5.23.0</mockito.version>