Taking out a bad change on docs rule (#4356)

Author: casibbald

.github/workflows/docs.yaml

@@ -50,7 +50,7 @@ jobs:
           retention-days: 90
 
   deploy:
-    if: "${{ github.repository_owner == 'weaveworks' && github.ref == 'refs/heads/main' && !github.event.pull_request.head.repo.fork" }}"
+    if: "${{ github.repository_owner == 'weaveworks' && !github.event.pull_request.head.repo.fork }}"
     permissions:
       statuses: write
       pull-requests: write