build: Add node to the setup

Author: TimothyJones

.github/workflows/gradle.yml

@@ -27,6 +27,10 @@ jobs:
       with:
         java-version: '17'
         distribution: 'temurin'
+    - name: Set up node
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20
 
     # Configure Gradle for optimal use in GiHub Actions, including caching of downloaded dependencies.
     # See: https://github.com/gradle/actions/blob/main/setup-gradle/README.md