Pip install mike in github action

Author: pflooky

.github/workflows/docs-site-deploy.yaml

@@ -25,6 +25,6 @@ jobs:
           path: .cache
           restore-keys: |
             mkdocs-material-
-      - run: pip install mkdocs-open-in-new-tab
+      - run: pip install mkdocs-open-in-new-tab mike
       - run: pip install mkdocs-material
       - run: mike deploy --push --update-aliases ${{ github.event.release.tag_name }} latest