maint: update versions of actions in CI

Author: oscarbenjamin

.github/workflows/buildwheel.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v4
 
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.3.1
@@ -46,8 +46,8 @@ jobs:
         python-version: ['3.7', '3.8', '3.9', '3.10']
 
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - uses: actions/download-artifact@v3