chore(deps): bump actions/checkout in the github-actions group

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 6 to 7
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/checks.yml

@@ -12,5 +12,5 @@ jobs:
   checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: Screenly/edge-apps-actions/checks@v1

.github/workflows/initialize-edge-app.yml

@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: ${{ inputs.environment }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           ref: main
       - uses: Screenly/edge-apps-actions/initialize@v1

.github/workflows/initialize-rss-reader-app.yml

@@ -58,7 +58,7 @@ jobs:
 
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           ref: main
 

.github/workflows/update-edge-app.yml

@@ -17,7 +17,7 @@ jobs:
     if: github.ref == 'refs/heads/main'
     environment: stage
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: Screenly/edge-apps-actions/update@v1
         with:
           screenly_api_token: ${{ secrets.SCREENLY_API_TOKEN }}
@@ -30,7 +30,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/v')
     environment: production
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: Screenly/edge-apps-actions/update@v1
         with:
           screenly_api_token: ${{ secrets.SCREENLY_API_TOKEN }}

.github/workflows/update-rss-reader-apps.yml

@@ -53,7 +53,7 @@ jobs:
       manifest_file_name: ${{ steps.set-env.outputs.manifest_file_name }}
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set environment
         id: set-env
@@ -116,7 +116,7 @@ jobs:
       SCREENLY_API_TOKEN: ${{ secrets.SCREENLY_API_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Setup yq
         uses: ./.github/actions/setup-yq