Have PR preview actions run even on branches from forks

Author: samsrabin

.github/workflows/docs.yml

@@ -89,8 +89,7 @@ jobs:
           make BUILDDIR=${PWD}/_build -C doc/ html
       - name: Push PR preview
         if: |
-          github.event_name == 'pull_request' &&
-          github.event.pull_request.head.repo.full_name == github.repository
+          github.event_name == 'pull_request'
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{secrets.GITHUB_TOKEN}}
@@ -100,8 +99,7 @@ jobs:
           user_email: 'github-actions[bot]@users.noreply.github.com'
       - name: Comment about previewing documentation
         if: |
-          github.event_name == 'pull_request' &&
-          github.event.pull_request.head.repo.full_name == github.repository
+          github.event_name == 'pull_request'
         uses: actions/github-script@v6
         with:
           script: |