chore(deps): update actions/checkout action to v7 (#19)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
   lint-and-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-python@v5
         with:
@@ -28,7 +28,7 @@ jobs:
   docker-build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3