feat: add support for Scarlett 3rd-gen 4i4

Author: clook

README.md

@@ -10,6 +10,7 @@ Currently supported models, first generation of
 third generation of
 - 4i4
 - 8i6
+- 4i4
 
 This is just a GUI, the device **must** be supported by the ALSA Linux kernel device-driver.