chore(deps): update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/release-please.yml

@@ -38,7 +38,7 @@ jobs:
             echo "has_pr=false" >> $GITHUB_OUTPUT
           fi
 
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
         if: steps.check-pr.outputs.has_pr == 'true'
         with:
           ref: ${{ steps.check-pr.outputs.pr_branch }}

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
     name: Unit tests (bats)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
         with:
           submodules: recursive
 
@@ -35,7 +35,7 @@ jobs:
     name: Shellcheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
 
       - name: Run shellcheck
         run: shellcheck --severity=error src/crabcode