Update Pico-PIO-USB submodule

Author: jepler

.gitmodules

@@ -345,7 +345,7 @@
 	url = https://github.com/adafruit/Adafruit_CircuitPython_Wave.git
 [submodule "ports/raspberrypi/lib/Pico-PIO-USB"]
 	path = ports/raspberrypi/lib/Pico-PIO-USB
-	url = https://github.com/sekigon-gonnoc/Pico-PIO-USB.git
+	url = https://github.com/adafruit/Pico-PIO-USB.git
 [submodule "lib/micropython-lib"]
 	path = lib/micropython-lib
 	url = https://github.com/micropython/micropython-lib.git