chore(deps): update actions/checkout action to v4.2.1

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-22.04
     container: ghcr.io/miracum/ig-build-tools:v2.1.6@sha256:26bc1eaf0a259e8c16d0eeeb8622c7aecaa45d41e39f158696f9aec90b142596
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
       - name: build ig
         working-directory: PseudonymizationIG/
         run: |