Fix file perms in CI

.github/workflows/docs.yml

@@ -46,6 +46,12 @@ jobs:
       - name: Write CNAME file
         run: echo "docs.protomask.ewpratten.com" > /tmp/combined/CNAME
 
+      - name: Fix permissions
+        run: |
+          chmod -c -R +rX "/tmp/combined/" | while read line; do
+            echo "::warning title=Invalid file permissions automatically fixed::$line"
+          done
+
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v2
         with: