Documentation: Not documented statisticsId field

[Romick2005]

It can be passed to jitsiConnection.initJitsiConference method and is used in [JitsiConference.js](

lib-jitsi-meet/JitsiConference.js

Line 397 in f5f8a13

this._statsCurrentId = config.statisticsId ? config.statisticsId : Settings.callStatsUserName;

[vr-varad]

@Romick2005 could u explain the issue thoroughly it will be easy to resolve

[Romick2005]

The field statisticsId that could be passed as conference options is not documented, but it used in the code.

[tusharv01]

Please assign me this issue. @Romick2005

[fillingtothemomo]

@Romick2005 can you suggest the content to be added to documentation? Is this an acceptable format:

 * @param {string} [options.statisticsId] - The ID used for tracking conference statistics.