Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/coverage.yml

@@ -20,11 +20,11 @@ jobs:
       contents: read
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Checkout gh-automations scripts
         if: ${{ github.event_name == 'pull_request' }}
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           repository: OpenVoiceOS/gh-automations
           ref: dev

.github/workflows/tts-intelligibility.yml

@@ -24,11 +24,11 @@ jobs:
       TEST_PATH: 'test/end2end/test_tts_intelligibility.py'
       INSTALL_EXTRAS: 'test'
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Checkout gh-automations scripts
         if: ${{ github.event_name == 'pull_request' }}
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           repository: OpenVoiceOS/gh-automations
           ref: dev

.github/workflows/unit_tests.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Set up python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with: