chore: update Node.js setup in CI workflow to version 24 and upgrade setup-node action to v6

Author: dytsou

.github/workflows/ci.yml

@@ -40,9 +40,9 @@ jobs:
           version: 10.23.0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
-          node-version: 20
+          node-version: 24
           cache: pnpm
 
       - name: Install dependencies
@@ -75,9 +75,9 @@ jobs:
           version: 10.23.0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
-          node-version: 20
+          node-version: 24
           cache: pnpm
 
       - name: Detect E2E-impacting changes