Fix antora-playbook.yml

When 3.0.x was renamed to main the antora playbook should have been copied
from 2.7.x to 3.0.x.

Closes gh-2135

Author: rwinch

spring-session-docs/antora-playbook.yml

@@ -7,10 +7,10 @@ asciidoc:
 content:
   sources:
     - url: https://github.com/spring-io/spring-generated-docs
-      branches: [spring-projects/spring-session/3.0.0-M3,spring-projects/spring-session/main,'spring-projects/spring-session/2.6.*', 'spring-projects/spring-session/2.7.*']
+      branches: [spring-projects/spring-session/*]
     - url: https://github.com/spring-projects/spring-session
-      branches: [main,2.6.x,2.7.x]
-      tags: ['3.*','2.6.*','2.7.*','!2.6.0-M*','!2.6.0-R*','!2.7.0-M*','!3.0.0-M1','!3.0.0-M2']
+      branches: [main,2.7.x,2.6.x]
+      tags: [ '3.0.*', '2.7.*', '2.6.*','!2.6.0-M*','!2.6.0-RC*','!2.7.0-M1','!3.0.0-M1']
       start_path: spring-session-docs
 urls:
   latest_version_segment_strategy: redirect:to