Update CI build: USBHostMbed5 branch test_hs_in_fs has been merged to master. (#27)

arduino-libraries/Arduino_USBHostMbed5#3

Author: aentinger

.github/workflows/compile-examples.yml

@@ -50,7 +50,6 @@ jobs:
             # Install the library from the local path.
             - source-path: ./
             - source-url: https://github.com/facchinm/USBHostMbed5.git
-              version: test_hs_in_fs
           sketch-paths: |
             - examples
           enable-deltas-report: true