adds all html files

.github/workflows/sandpaper-main.yaml

@@ -67,14 +67,14 @@ jobs:
             git fetch origin
             git checkout gh-pages
 
-      - name: "Modify index.html"
+      - name: "Modify .html"
         run: |
             find . -name "*.html" -exec sh -c 'echo "<script src="files/additional.js" type="text/javascript"></script>" >> "$1"' _ {} \;
 
       - name: "Commit and Push Changes"
         run: |
             git config user.name "github-actions[bot]"
             git config user.email "github-actions[bot]@users.noreply.github.com"
-            git add index.html
+            git add *.html
             git commit -m "Add a new line to index.html via GitHub Actions"
             git push origin gh-pages