Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/codeql.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v2

.github/workflows/playwright.yml

@@ -9,7 +9,7 @@ jobs:
     timeout-minutes: 60
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-node@v3
       with:
         node-version: 18