Update actions/checkout action to v4.3.0

Author: small-hack-renovate[bot]

.github/workflows/renovate.yml

@@ -23,7 +23,7 @@ jobs:
           app_id: ${{ secrets.APP_ID }}
 
       - name: Checkout
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v4.3.0
 
       - name: Self-hosted Renovate
         uses: renovatebot/github-action@v43.0.7