Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/publish.yaml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
            fetch-depth: 0
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: 3.x
       - uses: actions/cache@v4

.github/workflows/tests.yaml

@@ -13,7 +13,7 @@
           - uses: actions/checkout@v4
             with:
                fetch-depth: 0
-          - uses: actions/setup-python@v5
+          - uses: actions/setup-python@v6
             with:
               python-version: 3.x
           - uses: actions/cache@v4