Updating github actions

Author: monikakonieczna

.github/workflows/run-tests-by-group.yml

@@ -21,12 +21,12 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: '16' 
+          node-version: '20' 
 
       - name: Install dependencies
         run: npm install