Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/lint.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.14'
 
@@ -44,7 +44,7 @@ jobs:
           ref: ${{ github.head_ref || github.ref }}
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.14'