Bump org.springframework.plugin:spring-plugin-core from 3.0.0 to 4.0.0 (#2804)

Bumps [org.springframework.plugin:spring-plugin-core](https://github.com/spring-projects/spring-plugin) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/spring-projects/spring-plugin/releases)
- [Commits](https://github.com/spring-projects/spring-plugin/compare/3.0.0...4.0.0)

---
updated-dependencies:
- dependency-name: org.springframework.plugin:spring-plugin-core
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -52,7 +52,7 @@
         <spring.boot.version>3.5.7</spring.boot.version>
         <spring.cloud.version>2025.0.0</spring.cloud.version>
         <springdoc-openapi.version>2.8.14</springdoc-openapi.version>
-        <spring.plugin.core.version>3.0.0</spring.plugin.core.version>
+        <spring.plugin.core.version>4.0.0</spring.plugin.core.version>
 
         <!-- Spring boot version overrides (should be reviewed with every Spring boot upgrade) - START -->
         <!-- Newer versions needed than defined in the Spring boot -->