chore(deps)(deps): bump org.springframework.ai:spring-ai-bom

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


Updates `org.springframework.ai:spring-ai-bom` from 2.0.0-M4 to 2.0.0-M5
- [Release notes](https://github.com/spring-projects/spring-ai/releases)
- [Commits](spring-projects/spring-ai@v2.0.0-M4...v2.0.0-M5)

---
updated-dependencies:
- dependency-name: org.springframework.ai:spring-ai-bom
  dependency-version: 2.0.0-M5
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: spring
...

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

Author: dependabot[bot]

pom.xml

@@ -23,7 +23,7 @@
     <properties>
         <java.version>25</java.version>
         <neo4j.version>2026.04.0</neo4j.version>
-        <spring-ai.version>2.0.0-M4</spring-ai.version>
+        <spring-ai.version>2.0.0-M5</spring-ai.version>
         <picocli.version>4.7.7</picocli.version>
         <jacoco.version>0.8.14</jacoco.version>
         <spotbugs.version>4.9.8.3</spotbugs.version>