fix small typo of README
fix small typo of README

scorpionis/docklet,FirmlyReality/docklet,caodg/docklet,FirmlyReality/docklet,caodg/docklet,FirmlyReality/docklet,scorpionis/docklet,caodg/docklet,caodg/docklet,FirmlyReality/docklet