Update wifi suspend documentation (#1910)
Update wifi suspend documentation (#1910)

* Added message about potential for wifi crashes and more

Added message about potential for wifi crashes caused by long running
functions

Modified description for wifi.resume() and wifi.suspend()
oyooyo/nodemcu-firmware,TerryE/nodemcu-firmware,devsaurus/nodemcu-firmware,luizfeliperj/nodemcu-firmware,nwf/nodemcu-firmware,djphoenix/nodemcu-firmware,nwf/nodemcu-firmware,HEYAHONG/nodemcu-firmware,nodemcu/nodemcu-firmware,eku/nodemcu-firmware,fetchbot/nodemcu-firmware,vsky279/nodemcu-firmware,oyooyo/nodemcu-firmware,TerryE/nodemcu-firmware,nodemcu/nodemcu-firmware,djphoenix/nodemcu-firmware,nwf/nodemcu-firmware,djphoenix/nodemcu-firmware,TerryE/nodemcu-firmware,oyooyo/nodemcu-firmware,FelixPe/nodemcu-firmware,nodemcu/nodemcu-firmware,devsaurus/nodemcu-firmware,fetchbot/nodemcu-firmware,marcelstoer/nodemcu-firmware,luizfeliperj/nodemcu-firmware,vsky279/nodemcu-firmware,marcelstoer/nodemcu-firmware,FelixPe/nodemcu-firmware,vsky279/nodemcu-firmware,eku/nodemcu-firmware,HEYAHONG/nodemcu-firmware,FelixPe/nodemcu-firmware,FrankX0/nodemcu-firmware,eku/nodemcu-firmware,nodemcu/nodemcu-firmware,eku/nodemcu-firmware,nodemcu/nodemcu-firmware,oyooyo/nodemcu-firmware,nwf/nodemcu-firmware,nwf/nodemcu-firmware,vsky279/nodemcu-firmware,FelixPe/nodemcu-firmware,devsaurus/nodemcu-firmware,marcelstoer/nodemcu-firmware,djphoenix/nodemcu-firmware,FrankX0/nodemcu-firmware,devsaurus/nodemcu-firmware,marcelstoer/nodemcu-firmware,FrankX0/nodemcu-firmware,marcelstoer/nodemcu-firmware,vsky279/nodemcu-firmware,luizfeliperj/nodemcu-firmware,HEYAHONG/nodemcu-firmware,luizfeliperj/nodemcu-firmware,HEYAHONG/nodemcu-firmware,TerryE/nodemcu-firmware,fetchbot/nodemcu-firmware,fetchbot/nodemcu-firmware,TerryE/nodemcu-firmware,FelixPe/nodemcu-firmware,FrankX0/nodemcu-firmware,HEYAHONG/nodemcu-firmware,FrankX0/nodemcu-firmware,devsaurus/nodemcu-firmware