Update actions/checkout action to v4.3.0

Author: renovate[bot]

.github/workflows/cla.yml

@@ -21,7 +21,7 @@ jobs:
           egress-policy: audit
 
       - name: Checkout Private Repo for Allowlist
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 #v4.2.2
+        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
         with:
           repository: OpenZeppelin/cla-sigs
           token: ${{ secrets.CLA_SIGS_ACCESS_PAT }}