Fix compile examples workflow

Author: pennam

.github/workflows/compile-examples.yml

@@ -33,15 +33,24 @@ jobs:
       matrix:
         board:
           - fqbn: "esp32:esp32:esp32"
+            type: esp32
+
+        include:
+          - board:
+              type: esp32
             platforms: |
               - name: esp32:esp32
                 source-url: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
-            libraries: ""
+            libraries:
 
     steps:
       - name: Checkout
         uses: actions/checkout@v3
 
+      - name: Install ESP32 platform dependencies
+        if: matrix.board.type == 'esp32'
+        run: pip3 install pyserial
+
       - name: Compile examples
         uses: arduino/compile-sketches@main
         with: