Merge pull request matplotlib#23261 from matplotlib/dependabot/github_actions/actions/setup-python-4

Bump actions/setup-python from 3 to 4

Author: oscargus

.github/workflows/cibuildwheel.yml

@@ -52,7 +52,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
         name: Install Python
         with:
           python-version: '3.8'

.github/workflows/nightlies.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Install Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: '3.x'
 

.github/workflows/reviewdog.yml

@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Set up Python 3
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
 

.github/workflows/tests.yml

@@ -61,7 +61,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}