chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/tests.yml

@@ -241,7 +241,7 @@ jobs:
         node: ['18.x']
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: actions/download-artifact@v4
         with: