Add 6.0.* tag to antora-playbook

Author: marcusdacoregio

docs/antora-playbook.yml

@@ -10,7 +10,7 @@ content:
       branches: [spring-projects/spring-security/*]
     - url: https://github.com/spring-projects/spring-security
       branches: [main,5.6.x,5.7.x]
-      tags: ['5.6.*','!5.6.0-M*','5.7.*']
+      tags: ['5.6.*','!5.6.0-M*','5.7.*','6.0.*']
       start_path: docs
 urls:
   latest_version_segment_strategy: redirect:to