dotstar_featherwing: Move to a different fork

The original maintainer has not responded to a needed PR over several
months, blocking adafruit/circuitpython-build-tools#111

Author: jepler

.gitmodules

@@ -9,7 +9,7 @@
 	url = https://github.com/mmabey/Adafruit_Soundboard.git
 [submodule "libraries/helpers/dotstar_featherwing"]
 	path = libraries/helpers/dotstar_featherwing
-	url = https://github.com/dastels/circuitPython_dotstar_featherwing.git
+	url = https://github.com/jepler/circuitPython_dotstar_featherwing.git
 [submodule "libraries/helpers/nonblocking_timer"]
 	path = libraries/helpers/nonblocking_timer
 	url = https://github.com/Angeleno-Tech/nonblocking_timer.git