Merge pull request #5 from HendrikBorgelt/dependabot/github_actions/rossjrw/pr-preview-action-1.8.0

Bump rossjrw/pr-preview-action from 1.6.3 to 1.8.0

Author: HendrikBorgelt

.github/workflows/test_pages_build.yaml

@@ -54,7 +54,7 @@ jobs:
 
       # https://github.com/rossjrw/pr-preview-action
       - name: Deploy preview
-        uses: rossjrw/pr-preview-action@v1.6.3
+        uses: rossjrw/pr-preview-action@v1.8.0
         with:
           source-dir: site/
           preview-branch: gh-pages