update readme action

.gitea/workflows/update_readme.yml

@@ -25,9 +25,14 @@ jobs:
       - name: Install Fetch
         run: |
             echo "Installing fetch"
+            if ! command -v node &> /dev/null; then
                 apt-get install -y curl
                 curl -fsSL https://deb.nodesource.com/setup_24.x | bash
-            npm install node-fetch
+            fi
+            package='node-fetch'
+            if [ `npm list -g | grep -c $package` -eq 0 ]; then
+                npm install $package --no-shrinkwrap
+            fi
       - name: Login to DockerHub container registry
         uses: https://github.com/docker/login-action@v3
         with: