Fix linkech action on PR

Author: divolgin

.github/main.workflow

@@ -1,14 +1,16 @@
 name: Hugo Link Check
 on:
   pull_request:
-    types: [opened, synchronized]
+    branches:
+      - main
+
 jobs:
   filter-to-pr-open-synced:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - name: linkcheck
-      uses: marccampbell/hugo-linkcheck-action@v0.1.2
+      uses: marccampbell/hugo-linkcheck-action@v0.1.3
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         HUGO_FINAL_URL: https://help.replicated.com