Bump actions/checkout from 3 to 4

.github/workflows/labeler.yml

@@ -15,7 +15,7 @@ jobs:
       issues: write
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run Labeler
         uses: crazy-max/ghaction-github-labeler@v4

.github/workflows/release-stable.yml

@@ -17,7 +17,7 @@ jobs:
       contents: write
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 2
 

.github/workflows/release-unstable.yml

@@ -19,7 +19,7 @@ jobs:
       contents: write
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 2
 

.github/workflows/tests.yml

@@ -42,7 +42,7 @@ jobs:
 
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v4.7.0
@@ -121,7 +121,7 @@ jobs:
     needs: tests
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4.7.0