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

Author: renovate[bot]

.github/workflows/main.yml

@@ -12,7 +12,7 @@ jobs:
     name: Static Analysis
     steps:
       - name: Set up Python ${{ matrix.python-version }} on ${{ matrix.os }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - uses: actions/checkout@v4
@@ -47,7 +47,7 @@ jobs:
     name: Test with Python ${{ matrix.python-version }} on ${{ matrix.os }}
     steps:
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - uses: actions/checkout@v4
@@ -74,7 +74,7 @@ jobs:
     name: Build docs with Python ${{ matrix.python-version }} on ${{ matrix.os }}
     steps:
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - uses: actions/checkout@v4

.github/workflows/publish.yml

@@ -26,7 +26,7 @@ jobs:
       id-token: write
     steps:
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.14"
       - uses: actions/checkout@v4