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

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

Author: renovate[bot]

.github/workflows/continuous-integration.yaml

@@ -16,7 +16,7 @@ jobs:
         node-version: [22, 24, 26]
     steps:
     - name: Git checkout
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v6
@@ -30,7 +30,7 @@ jobs:
       runs-on: ubuntu-latest
       timeout-minutes: 60
       steps:
-        - uses: actions/checkout@v6
+        - uses: actions/checkout@v7
         - name: Use Node.js 24
           uses: actions/setup-node@v6
           with:
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
       - name: Use Node.js 24