Publish older version to grails/legacy-grails-doc

Author: puneetbehl

.github/workflows/release.yml

@@ -78,7 +78,7 @@ jobs:
         id: docs_target
         with:
           cond: ${{ github.repository == 'grails/grails-doc' }}
-          if_true: 'grails/grails-doc'
+          if_true: 'grails/legacy-grails-doc'
           if_false: ${{ github.repository }}
       - name: Publish to Github Pages
         if: success()