CI: Update actions/setup-python

Author: mrkn

.github/workflows/ci.yml

@@ -71,7 +71,7 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
 
-    - uses: actions/setup-python@v2
+    - uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python }}
         architecture: ${{ matrix.python_architecture }}

.github/workflows/windows.yml

@@ -42,7 +42,7 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
 
-    - uses: actions/setup-python@v2
+    - uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python }}
         architecture: ${{ matrix.python_architecture }}