Bump actions/setup-python from 3 to 4

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 3 to 4.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v3...v4)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -22,22 +22,22 @@ jobs:
           - "pydocstyle ."
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-python@v3
       - uses: actions/checkout@v3
-      - uses: actions/cache@v3
+      - uses: actions/setup-python@v4
         with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
-          restore-keys: |
-            ${{ runner.os }}-pip-
+          python-version: "3.10"
+          cache: 'pip'
+          cache-dependency-path: 'requirements.txt'
       - run: python -m pip install -r requirements.txt
       - run: ${{ matrix.lint-command }}
 
   readme:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-python@v3
       - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
       - name: Install Python dependencies
         run: python -m pip install --upgrade pip setuptools wheel twine readme-renderer
       - run: python setup.py sdist bdist_wheel
@@ -61,11 +61,11 @@ jobs:
           - "3.2a"
           - "4.0a"
     steps:
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
-    - uses: actions/checkout@v3
     - name: Upgrade Python setuptools
       run: python -m pip install --upgrade pip setuptools wheel codecov
     - run: python setup.py develop
@@ -86,8 +86,10 @@ jobs:
           - slugify
 
     steps:
-      - uses: actions/setup-python@v3
       - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade pip setuptools wheel codecov

.github/workflows/release.yml

@@ -8,8 +8,10 @@ jobs:
   PyPI:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-python@v3
       - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
       - name: Install Python dependencies
         run: python -m pip install --upgrade pip setuptools wheel twine
       - name: Build dist packages