ci: update upload-artifact dependency

Author: ethomson

.github/workflows/main.yml

@@ -365,7 +365,7 @@ jobs:
             cm doc api.docurium
         git checkout gh-pages
         zip --exclude .git/\* --exclude .gitignore --exclude .gitattributes -r api-documentation.zip .
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       name: Upload artifact
       with:
         name: api-documentation