Bump org.springframework.security:spring-security-oauth2-authorization-server (#15949)

Bumps [org.springframework.security:spring-security-oauth2-authorization-server](https://github.com/spring-projects/spring-authorization-server) from 1.5.1 to 1.5.5.
- [Release notes](https://github.com/spring-projects/spring-authorization-server/releases)
- [Commits](spring-projects/spring-authorization-server@1.5.1...1.5.5)

---
updated-dependencies:
- dependency-name: org.springframework.security:spring-security-oauth2-authorization-server
  dependency-version: 1.5.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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dubbo-plugin/dubbo-spring6-security/pom.xml

@@ -29,7 +29,7 @@
 
   <properties>
     <skip_maven_deploy>false</skip_maven_deploy>
-    <spring.oauth2.server>1.5.1</spring.oauth2.server>
+    <spring.oauth2.server>1.5.5</spring.oauth2.server>
   </properties>
 
   <dependencies>