Bump actions/upload-pages-artifact from 2 to 3 (#12)

Author: dependabot[bot]

.github/workflows/github-pages.yml

@@ -33,7 +33,7 @@ jobs:
         uses: actions/configure-pages@v4
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
         with:
           path: docs/