chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/release-please.yaml

@@ -17,7 +17,7 @@ jobs:
         id: release
         with:
           token: ${{ secrets.RELEASE_PLEASE_TOKEN }}
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
         with:
           token: ${{ secrets.RELEASE_PLEASE_TOKEN }}
           fetch-depth: 0

.github/workflows/update-readme.yaml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
         with:
           fetch-depth: 0
           token: ${{ secrets.RELEASE_PLEASE_TOKEN }}