Bump actions/checkout from 4 to 5 (#160)

Author: dependabot[bot]

.github/workflows/pythonpackage.yml

@@ -13,7 +13,7 @@ jobs:
     name: Check with Ruff
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
@@ -29,7 +29,7 @@ jobs:
   PyLint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
@@ -49,7 +49,7 @@ jobs:
   MyPy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
@@ -69,7 +69,7 @@ jobs:
   Black:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
@@ -85,7 +85,7 @@ jobs:
   Refurb:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
@@ -108,7 +108,7 @@ jobs:
 
     name: "Script based python ${{ matrix.python-version }} on ${{ matrix.os }}"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
@@ -149,7 +149,7 @@ jobs:
     needs: [ Test ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0  # need for setuptools_scm
       - name: Set up Python
@@ -173,7 +173,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [ Build ]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python
         uses: actions/setup-python@v5
         with: