chore: Bump to 7.87.x in publication-builder (#2744)

Signed-off-by: Mykhailo Kuznietsov <[email protected]>
Co-authored-by: Mykhailo Kuznietsov <[email protected]>

Author: che-bot

publication-builder-antora-playbook.yml

@@ -20,7 +20,7 @@ content:
   sources:
     - url: https://github.com/eclipse-che/che-docs
       branches:
-        - 7.86.x
+        - 7.87.x
         - main
       edit_url: "{web_url}/edit/{refname}/{path}"
 antora: