docs/ure: Fix match.group signature to indicate index param is required.
docs/ure: Fix match.group signature to indicate index param is required.

trezor/micropython,pfalcon/micropython,pozetroninc/micropython,tobbad/micropython,tobbad/micropython,adafruit/circuitpython,henriknelson/micropython,trezor/micropython,pfalcon/micropython,adafruit/circuitpython,henriknelson/micropython,pfalcon/micropython,henriknelson/micropython,bvernoux/micropython,kerneltask/micropython,MrSurly/micropython,selste/micropython,pramasoul/micropython,pfalcon/micropython,MrSurly/micropython,selste/micropython,pozetroninc/micropython,trezor/micropython,adafruit/circuitpython,tobbad/micropython,pramasoul/micropython,pozetroninc/micropython,adafruit/circuitpython,bvernoux/micropython,adafruit/circuitpython,selste/micropython,adafruit/circuitpython,bvernoux/micropython,MrSurly/micropython,pozetroninc/micropython,henriknelson/micropython,kerneltask/micropython,pramasoul/micropython,henriknelson/micropython,kerneltask/micropython,bvernoux/micropython,trezor/micropython,selste/micropython,pramasoul/micropython,kerneltask/micropython,selste/micropython,pramasoul/micropython,tobbad/micropython,tobbad/micropython,MrSurly/micropython,MrSurly/micropython,trezor/micropython,pfalcon/micropython,bvernoux/micropython,kerneltask/micropython,pozetroninc/micropython