Bump usbd-hid to 0.8

Older versions of this package might not build anymore. See the upstream
issue tracker for details. We're prepared to increase our version as of
the previous commit.

I re-tested the mouse example on a 1010EVK.

Cargo.toml

@@ -157,7 +157,7 @@ defmt = "0.3"
 pin-utils = "0.1"
 usb-device = { version = "0.3", features = ["test-class-high-speed"] }
 usbd-serial = "0.2"
-usbd-hid = "0.7"
+usbd-hid = "0.8"
 
 [target.'cfg(all(target_arch = "arm", target_os = "none"))'.dev-dependencies]
 board = { path = "board" }