Update build.yml

Signed-off-by: Frédéric Metrich <45318189+FredM67@users.noreply.github.com>

.github/workflows/build.yml

@@ -30,6 +30,8 @@ jobs:
         key: ${{ runner.os }}-pio
     - name: Set up Python
       uses: actions/setup-python@v4
+      with:
+        python-version: 'latest'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip