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] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -46,7 +46,7 @@ jobs:
     - uses: actions/checkout@v5
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
           python-version: 3.9
     - name: make ${{ matrix.board }}
@@ -85,7 +85,7 @@ jobs:
     - uses: actions/checkout@v5
       with:
         fetch-depth: 0    
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
           python-version: 3.9
     - name: make ${{ matrix.board }}
@@ -123,7 +123,7 @@ jobs:
     - uses: actions/checkout@v5
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
           python-version: 3.9
     - name: make ${{ matrix.board }}