chore(deps): update actions/setup-python action to v6

Author: renovate-bot

.github/workflows/macos-cmake.yml

@@ -67,7 +67,7 @@ jobs:
       with:
         create_credentials_file: true
         credentials_json: ${{ secrets.BUILD_CACHE_KEY }}
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       id: py311
       with:
         python-version: '3.14'

.github/workflows/windows-cmake.yml

@@ -73,7 +73,7 @@ jobs:
       with:
         create_credentials_file: true
         credentials_json: ${{ secrets.BUILD_CACHE_KEY }}
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       id: py311
       with:
         python-version: '3.14'