Support checks in forked repositories

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

.forgejo/workflows/jekyll.yaml

@@ -56,6 +56,7 @@ jobs:
           jekyll build --verbose
       - name: Deploy Jekyll site
         id: deploy_site
+        if: ${{ ! forge.event.pull_request.head.repo.fork }}
         run: |
           if [ "${{ forge.ref }}" = 'refs/heads/main' ]; then
             WEB_ROOT="${WEB_DIR}/live"

.forgejo/workflows/jekyll_cleanup.yml

@@ -12,6 +12,7 @@ env:
   WEB_CONTEXT: "/${{ forge.event.pull_request.number }}/"
 jobs:
   jekyll_cleanup:
+    if: ${{ ! forge.event.pull_request.head.repo.fork }}
     runs-on: ubuntu-22.04
     permissions:
       pull-requests: read