Fix firebase-tools installation

Author: jeromegamez

.github/workflows/emulator-tests.yml

@@ -55,7 +55,13 @@ jobs:
       - name: Set Up Node
         uses: actions/setup-node@v6
         with:
-          node-version: '20'
+          node-version: '24'
+
+      - name: Set Up Java
+        uses: actions/setup-java@v5.1.0
+        with:
+          distribution: 'temurin'
+          java-version: '21'
 
       - name: Install Firebase Tools
         run: npm install -g firebase-tools