Bump actions/setup-python from 5 to 6

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/config.yml

@@ -13,7 +13,7 @@ jobs:
         with:
           show-progress: false
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.x
       - run: pip install cpplint
@@ -33,7 +33,7 @@ jobs:
           git config --global credential.helper store
           echo "https://oauth2:${{ secrets.GH_TOKEN }}@github.com" > ~/.git-credentials
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.x
       - name: Install Platform IO
@@ -57,7 +57,7 @@ jobs:
           git config --global credential.helper store
           echo "https://oauth2:${{ secrets.GH_TOKEN }}@github.com" > ~/.git-credentials
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.x
       - name: Install Platform IO