Merge pull request #68 from jelmer/bump-upload-pages-artifact

github: Bump version of actions/upload-pages-artifact@v3

Author: jelmer

.github/workflows/publish-docs.yml

@@ -22,7 +22,7 @@ jobs:
         run: mdbook build doc
 
       - name: Upload book
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
         with:
           path: doc/book/
           retention-days: "3"