ci: update actions/upload-page-artifact to v3.0.1 (#131)

Author: Wenzel

.github/workflows/docs.yml

@@ -107,7 +107,7 @@ jobs:
         uses: actions/configure-pages@b8130d9ab958b325bbde9786d62f2c97a9885a0e # v3.0.7
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@a753861a5debcf57bf8b404356158c8e1e33150c # v2.0.0
+        uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3.0.1
         with:
           path: "./docs/book/html/"