build: fix pip platformio install

.github/workflows/firmware_build.yml

@@ -16,9 +16,13 @@ jobs:
           path: BlueSCSI
           fetch-depth: "0"
 
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
       - name: Install platformio
         run: |
-          sudo pip install platformio
+          pip install --upgrade platformio
 
       - name: Build firmware
         run: |