add_workflow_auto_updates_snapshot

.github/workflows/update_readme.yml

@@ -0,0 +1,29 @@
+name: update readme
+# on: 
+#   schedule:
+#     - cron: '0 12 */7 * *'
+on:
+  pull_request:
+    branches:
+      - main 
+run-name:  update readme
+jobs:
+  update-readme:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Update README
+      run: |
+        date=$(date +%Y%m%d)
+        current_time=$(grep -Eo '[0-9]{8}' run-node-mainnetv2.md |head -n1)
+        sed -i "s/${current_time}/$date/g" run-node-mainnetv2.md
+        git add run-node-mainnetv2.md
+        git commit -m "update snapshot tar date"
+        git push https://mantle-git-bot:${{ secrets.PAT }}@github.com/mantlenetworkio/networks.git
+
+    # - uses: int128/update-generated-files-action@v2
+    #   name: Update resources
+    #   with:
+    #     token: ${{ secrets.PAT }}
+    #     commit-message: "Update snapshot date"