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

Author: renovate[bot]

.github/workflows/build_document.yml

@@ -33,7 +33,7 @@ jobs:
           sudo apt-get install dvipng
 
       - name: Set up Python ${{env.python_version}}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{env.python_version}}
 

.github/workflows/python_test.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Set up Python ${{matrix.python-version}}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{matrix.python-version}}
       - name: Install dependencies

.github/workflows/sonarcloud_check.yml

@@ -23,7 +23,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.9