docs/uselect: ipoll: Fix grammar/wording of one-shot flag description.
docs/uselect: ipoll: Fix grammar/wording of one-shot flag description.

pozetroninc/micropython,ryannathans/micropython,kerneltask/micropython,adafruit/micropython,ryannathans/micropython,adafruit/micropython,infinnovation/micropython,pozetroninc/micropython,lowRISC/micropython,adafruit/circuitpython,pfalcon/micropython,tralamazza/micropython,pfalcon/micropython,lowRISC/micropython,tralamazza/micropython,lowRISC/micropython,pramasoul/micropython,lowRISC/micropython,trezor/micropython,swegener/micropython,adafruit/micropython,infinnovation/micropython,tobbad/micropython,pramasoul/micropython,MrSurly/micropython,MrSurly/micropython,adafruit/circuitpython,adafruit/circuitpython,swegener/micropython,ryannathans/micropython,kerneltask/micropython,bvernoux/micropython,henriknelson/micropython,henriknelson/micropython,pfalcon/micropython,blazewicz/micropython,adafruit/micropython,pramasoul/micropython,infinnovation/micropython,tobbad/micropython,pozetroninc/micropython,tobbad/micropython,dmazzella/micropython,MrSurly/micropython,ryannathans/micropython,MrSurly/micropython,bvernoux/micropython,selste/micropython,pramasoul/micropython,bvernoux/micropython,tralamazza/micropython,infinnovation/micropython,MrSurly/micropython,tralamazza/micropython,pozetroninc/micropython,selste/micropython,blazewicz/micropython,adafruit/circuitpython,kerneltask/micropython,bvernoux/micropython,swegener/micropython,dmazzella/micropython,bvernoux/micropython,blazewicz/micropython,selste/micropython,blazewicz/micropython,pfalcon/micropython,tobbad/micropython,blazewicz/micropython,swegener/micropython,henriknelson/micropython,adafruit/micropython,ryannathans/micropython,henriknelson/micropython,dmazzella/micropython,pramasoul/micropython,pozetroninc/micropython,tobbad/micropython,adafruit/circuitpython,trezor/micropython,adafruit/circuitpython,infinnovation/micropython,kerneltask/micropython,trezor/micropython,henriknelson/micropython,lowRISC/micropython,pfalcon/micropython,trezor/micropython,dmazzella/micropython,trezor/micropython,selste/micropython,kerneltask/micropython,swegener/micropython,selste/micropython