added upgrade for requirements installation

Author: daxcore

.github/workflows/ci.yml

@@ -63,5 +63,5 @@ jobs:
           restore-keys: |
             mkdocs-material-
       - run: pip install mkdocs-material
-      - run: pip install -r requirements.txt
+      - run: pip install -r requirements.txt --upgrade
       - run: mkdocs gh-deploy --force