MAINTAINERS: USB: add @josuah as collaborator

Add a 3rd reviewer to USB area.

Signed-off-by: Josuah Demangeon <me@josuah.net>

Author: josuah

MAINTAINERS.yml

@@ -5088,6 +5088,7 @@ USB:
     - jfischer-no
   collaborators:
     - tmon-nordic
+    - josuah
   files:
     - drivers/usb/
     - dts/bindings/usb/