Update actions/checkout action to v4

Author: renovate-rancher[bot]

.github/workflows/renovate.yaml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
       # Don't waste time starting Renovate if JSON is invalid
       - name: Validate Renovate JSON
         run: jq type .github/renovate.json