Bump actions/checkout from 3 to 7 (#293)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v7)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/container.yml

@@ -15,7 +15,7 @@ jobs:
       MBTA_V3_API_KEY: ${{ secrets.TM_NTT_CERT_ARN }}
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v7
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v4

.github/workflows/deploy.yml

@@ -21,7 +21,7 @@ jobs:
       DD_API_KEY: ${{ secrets.DD_API_KEY }}
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v7
         with:
           fetch-tags: true
       - name: Set up Python ${{ matrix.python-version }}

.github/workflows/label.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v3
+      uses: actions/checkout@v7
     - name: Label PR
       uses: actions/labeler@v6
       with:

.github/workflows/lint.yml

@@ -15,7 +15,7 @@ jobs:
         python-version: ['3.13']
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v7
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:
@@ -42,7 +42,7 @@ jobs:
         python-version: ['3.13']
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v7
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
         python-version: ['3.13']
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v7
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with: