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

Author: renovate[bot]

.github/actions/format/action.yml

@@ -8,7 +8,7 @@ runs:
   using: 'composite'
   steps:
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
         python-version: '3.8'
 

.github/workflows/lint.yml

@@ -19,7 +19,7 @@ jobs:
     - uses: actions/checkout@v6
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -52,7 +52,7 @@ jobs:
     - uses: actions/checkout@v6
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
         python-version: "3.8"