chore(deps): update actions/checkout action to v7 (#94)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ${{ matrix.runner }}
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: ./
         with:
           github-app-id: ${{ vars.FRECKLE_AUTOMATION_APP_ID }}
@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - run: rm .platform.yaml # so it'll be downloaded
       - id: setup
         uses: ./
@@ -56,7 +56,7 @@ jobs:
       AWS_SECRET_ACCESS_KEY: x
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - id: setup
         uses: ./
         with: