Artifact actions fix

Author: p1c2u

.github/workflows/build-docs.yml

@@ -44,7 +44,7 @@ jobs:
         run: |
           poetry run python -m sphinx -T -b html -d docs/_build/doctrees -D language=en docs docs/_build/html -n -W
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         name: Upload docs as artifact
         with:
           name: docs-html