build(deps): 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/windows.yml

@@ -12,7 +12,7 @@ jobs:
     - name: 'Checkout'
       uses: actions/checkout@v5
     - name: 'Setup Python'
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: '3.x'
     - name: 'Install Meson'
@@ -33,7 +33,7 @@ jobs:
     - name: 'Checkout'
       uses: actions/checkout@v5
     - name: 'Setup Python'
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: '3.x'
     - name: 'Install Meson'