Load Arduino_POSIXStorage library before compile

Author: aliphys

Diff for: .github/workflows/compile-examples.yml

@@ -59,6 +59,7 @@ jobs:
             # Install the library from the local path.
             - source-path: ./
             - name: Arduino_USBHostMbed5
+            - source-path: https://github.com/arduino-libraries/Arduino_POSIXStorage
             # Additional library dependencies can be listed here.
             # See: https://github.com/arduino/compile-sketches#libraries
           sketch-paths: |