ci: bump actions/checkout from 2 to 4 (#151)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Fabian Braun <[email protected]>

.github/workflows/codecov.yml

@@ -29,7 +29,7 @@ jobs:
         ]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         fetch-depth: '2'
 

.github/workflows/codeql.yml

@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/docs.yml

@@ -12,7 +12,7 @@ jobs:
     name: build
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
@@ -37,7 +37,7 @@ jobs:
     needs: build
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python
         uses: actions/setup-python@v4
         with:

.github/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up Python
         uses: actions/setup-python@v4
         with:

.github/workflows/publish-to-live-pypi.yml

@@ -10,7 +10,7 @@ jobs:
     name: Build and publish Python 🐍 distributions 📦 to pypi
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python 3.10
       uses: actions/setup-python@v4
       with:

.github/workflows/publish-to-test-pypi.yml

@@ -10,7 +10,7 @@ jobs:
     name: Build and publish Python 🐍 distributions 📦 to TestPyPI
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python 3.10
       uses: actions/setup-python@v4
       with: