docs: Add workflow_dispatch

Author: ratankaliani

.github/workflows/book.yml

@@ -11,6 +11,7 @@ on:
     paths:
       - "book/**"
   merge_group:
+  workflow_dispatch:
 
 jobs:
   lint:
@@ -100,4 +101,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v4