ci: bump actions/setup-python from 5 to 6 (#569)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build_pypi.yml

@@ -68,7 +68,7 @@ jobs:
 
       - name: "Set up Python"
         id: setup_python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
           cache: 'poetry'

.github/workflows/tests.yml

@@ -46,7 +46,7 @@ jobs:
 
       - name: "Set up Python"
         id: setup_python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'poetry'