ci: lock mdbook to 0.4.52

Author: avivace

.github/workflows/build-and-deploy.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Install mdbook
         uses: peaceiris/actions-mdbook@v1
         with:
-          mdbook-version: latest
+          mdbook-version: 0.4.52
 
       - name: Install static-sitemap-cli
         run: npm install static-sitemap-cli