Fix mike deployment

jimporter/mike#188

.github/workflows/on-merge-master.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install mkdocs mkdocs-material mike
+          pip install mkdocs==1.5.3 mkdocs-material==9.4.2 mike==1.1.2
 
       - name: Get current branch name
         shell: bash