chore(deps): update actions/checkout action to v7 (#36)

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           ref: ${{ github.head_ref }}
 
@@ -88,7 +88,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up Python ${{ env.PYTHON_VERSION }}
         uses: actions/setup-python@v7
@@ -149,7 +149,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up Python ${{ env.PYTHON_VERSION }}
         uses: actions/setup-python@v7
@@ -208,7 +208,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up Python ${{ env.PYTHON_VERSION }}
         uses: actions/setup-python@v7
@@ -249,7 +249,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up Python ${{ env.PYTHON_VERSION }}
         uses: actions/setup-python@v7
@@ -309,7 +309,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up Python ${{ env.PYTHON_VERSION }}
         uses: actions/setup-python@v7
@@ -362,7 +362,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up Python ${{ env.PYTHON_VERSION }}
         uses: actions/setup-python@v7
@@ -469,7 +469,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up Python ${{ env.PYTHON_VERSION }}
         uses: actions/setup-python@v7