deploy docs for the latest release to 'latest'

.github/workflows/gh-pages.yaml

@@ -6,6 +6,12 @@ on:
     tags: ['v**']
 
   workflow_dispatch:
+    inputs:
+      set-latest:
+        type: boolean
+        required: true
+        default: false
+        description: Whether the deployed docs should be marked as the latest
 
 permissions:
   contents: write
@@ -38,3 +44,11 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: docs
           destination_dir: ${{ github.ref_name }}
+
+      - name: Deploy for the latest release
+        if: startsWith(github.ref, 'refs/tags/v') || inputs.set-latest
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: docs
+          destination_dir: latest