fix: Correct version requirement (#165)

.github/workflows/publish-docs.yaml

@@ -33,7 +33,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install mike=1.1.2 mkdocs-material==9.1.4 mkdocs-include-markdown-plugin==4.0.4
+          pip install mike==1.1.2 mkdocs-material==9.1.4 mkdocs-include-markdown-plugin==4.0.4
 
       - name: git config
         run: |