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

Author: renovate[bot]

.github/workflows/build_marimo_jupyterlab.yaml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     - name: Log in to GitHub Container Registry
       uses: docker/login-action@v4

.github/workflows/publish_dbt_docs.yaml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - name: "Step 01 - Checkout current branch"
       id: step-01
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     - name: "Step 02 - Install dbt"
       id: step-02

.github/workflows/pytest.yaml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     - name: Install uv
       uses: astral-sh/setup-uv@v8.3.0