Merge pull request #58 from crossplane-contrib/renovate/actions-checkout-5.x

chore(deps): update actions/checkout action to v5

Author: bobh66

.github/workflows/backport.yml

@@ -22,7 +22,7 @@ jobs:
     if: github.event.pull_request.merged
     steps:
       - name: Checkout
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0