chore(workflows): update CI workflow to use checkout v4

Author: pepinho24

.github/workflows/CI.yml

@@ -15,10 +15,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - name: Setup NodeJS
+        uses: actions/setup-node@v3
         with:
           node-version: '18'
 
@@ -31,4 +31,4 @@ jobs:
       - name: Karma
         run: npx gulp karma-ci
         env:
-          CHROME_BIN: /usr/bin/google-chrome
+          CHROME_BIN: /usr/bin/google-chrome