chore(deps): bump org.springframework.boot:spring-boot-starter (#866)

Bumps [org.springframework.boot:spring-boot-starter](https://github.com/spring-projects/spring-boot) from 3.5.0 to 4.0.6.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.0...v4.0.6)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter
  dependency-version: 4.0.6
  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>

Author: dependabot[bot]

samples/security/oauth/authorization-server/META-INF/maven/org.springframework.ai/spring-ai-autoconfigure-mcp-client/pom.xml

@@ -50,7 +50,7 @@
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter</artifactId>
-      <version>3.5.0</version>
+      <version>4.0.6</version>
       <scope>compile</scope>
     </dependency>
     <dependency>