Add support for Raspberry Pi Pico 2 build test

Author: mathieukaelin

.github/workflows/compile-examples.yml

@@ -80,6 +80,10 @@ jobs:
             platforms: |
               - name: rp2040:rp2040
                 source-url: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
+          - fqbn: rp2040:rp2040:rpipico2
+            platforms: |
+              - name: rp2040:rp2040
+                source-url: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
 
     steps:
       - name: Checkout