build(deps): bump actions/setup-python from 4 to 5 (#153)

.github/workflows/python.yml

@@ -18,7 +18,7 @@ jobs:
         python-version: ['3.9']
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
         # did not reduce runtime of `pipenv install` (still approx. 1 min)
@@ -41,7 +41,7 @@ jobs:
       fail-fast: false
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
         # did not reduce runtime of `pipenv install` (still approx. 1 min)
@@ -75,7 +75,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with: {python-version: 3.9}
     - run: '! ical2vdir --help'
     - run: pip install wheel==0.37.1
@@ -89,7 +89,7 @@ jobs:
         python-version: ['3.9']
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - run: pip install --upgrade pipenv==2023.6.18