docs: update README.md · AgoraIO-Extensions/Electron-SDK@b2fc3f6

'event' is defined but never used. Allowed unused args must match /^_/u

'onValueChange' is assigned a value but never used

'value' is already declared in the upper scope on line 243 column 18

'value' is already declared in the upper scope on line 243 column 18

'value' is already declared in the upper scope on line 243 column 18

'index' is defined but never used. Allowed unused args must match /^_/u

'index' is defined but never used. Allowed unused args must match /^_/u

'playbackDevices' is already declared in the upper scope on line 42 column 10

'recordingDevices' is already declared in the upper scope on line 48 column 10

'videoDevices' is already declared in the upper scope on line 58 column 10

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