Update c-cpp.yml

.github/workflows/c-cpp.yml

@@ -11,9 +11,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - run: sudo apt-get install python3-setuptools python3-wheel
-      - run: pip3 install platformio
+      - run: pip3 install platformi
+      - run: which platformio
       - uses: actions/checkout@v2
-      - run: platformio run
+      - run: pio run
     
   build:
     runs-on: self-hosted