Update node publish workflow to only publish when the version is bumped.

Author: comfyui-wiki

zh-CN/registry/publishing.mdx

@@ -119,24 +119,37 @@ See it here: https://registry.comfy.org/publisherId/your-node
 ```bash
 name: Publish to Comfy registry
 on:
-  workflow_dispatch:
   push:
-    branches:
-      - main
+    branches: [main]
     paths:
       - "pyproject.toml"
+  workflow_dispatch:
 
 jobs:
   publish-node:
-    name: Publish Custom Node to registry
     runs-on: ubuntu-latest
     steps:
-      - name: Check out code
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
+
+      - name: Detect version change
+        id: version_check
+        run: |
+          set -e
+          OLD_VERSION=$(git show HEAD^:pyproject.toml 2>/dev/null | grep '^version' | sed 's/.*"//' | sed 's/".*//')
+          NEW_VERSION=$(grep '^version' pyproject.toml | sed 's/.*"//' | sed 's/".*//')
+          echo "old=${OLD_VERSION}"
+          echo "new=${NEW_VERSION}"
+          if [ "$OLD_VERSION" != "$NEW_VERSION" ]; then
+            echo "changed=true" >> $GITHUB_OUTPUT
+          else
+            echo "changed=false" >> $GITHUB_OUTPUT
+          fi
+
       - name: Publish Custom Node
+        if: steps.version_check.outputs.changed == 'true'
         uses: Comfy-Org/publish-node-action@main
         with:
-          personal_access_token: ${{ secrets.REGISTRY_ACCESS_TOKEN }} ## Add your own personal access token to your Github Repository secrets and reference it here.
+          personal_access_token: ${{ secrets.REGISTRY_ACCESS_TOKEN }}
 ```
 
 <Warning>