Add link to USB dependancy

Author: aliphys

.github/workflows/compile-examples.yml

@@ -58,6 +58,7 @@ jobs:
           libraries: |
             # Install the library from the local path.
             - source-path: ./
+            - source-path: https://github.com/arduino-libraries/Arduino_USBHostMbed5
             # Additional library dependencies can be listed here.
             # See: https://github.com/arduino/compile-sketches#libraries
           sketch-paths: |