fix(ci): use the latest actions/setup-python

Author: thekaveman

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
         with:
           python-version-file: .github/workflows/.python-version
 

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
       - 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 }}