zh-cn: revise and update the translation of the WebRTC section

[wbxl2000]

I intend to revise and update the translation of the WebRTC section.

Contributions from anyone are welcome.

If you encounter any problems with the Simplified Chinese Set section or have already submitted a PR, please notify me so that I can include your work in the progress list below:

en-us homepage: https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API
zh-cn homepage: https://developer.mozilla.org/zh-CN/docs/Web/API/WebRTC_API

Guides 指南

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1. [zh-cn]: update the translation of "The WebRTC perfect negotiation pattern" #20754
   l10n-zh +1
2. [zh-cn]: update the translation of "Using WebRTC data channels" #20756
   l10n-zh +1
3. [zh-cn]: create the translation of "Using DTMF" #20757
   l10n-zh +1
   
4. [zh-cn]: update the translation of "Using WebRTC Encoded Transforms" #20759
   l10n-zh +1
5. [zh-cn]: update the translation of WebRTC API #20771
   l10n-zh +1
6. [zh-cn]: update the translation of "Building an Internet-Connected Phone with PeerJS" #20817
   l10n-zh +1

API 接口 Interface

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1. [zh-cn]: sync translation for RTCPeerConnection #18166
   l10n-zh +1
2. [zh-CN] sync translate RTCPeerConnection.addIceCandidate() method and RTCIceCandidate interface #19622
   l10n-zh +1
3. [zh-cn] sync the translation of RTCPeerConnection.addTrack() method #19631
   l10n-zh +1
4. [zh-CN] init translate RTCIceCandidate.candidate property #19634
   l10n-zh +1
5. [zh-cn] init the translation of RTCIceCandidate.port property #19661
   l10n-zh +1
6. [zh-CN] init the translation of RTCIceCandidate.priority property #19662
   l10n-zh +1
7. [zh-cn] init the translation of RTCIceCandidate.protocol property #19671
   l10n-zh +1
8. [zh-CN] init translate RTCIceCandidate.toJSON method #19684
   l10n-zh +1
9. [zh-CN] init translate RTCIceCandidate.tcpType property #19685
   l10n-zh +1
10. [zh-CN] init translate RTCIceCandidate.sdpmid property #19686
    l10n-zh +1
11. [zh-cn] init the translation of RTCIceCandidate.sdpMLineIndex property #19687
    l10n-zh +1
12. [zh-CN] init translate RTCIceCandidate.usernamefragment property #19693
    l10n-zh +1
13. [zh-CN] init the translation of RTCIceCandidate.foundation property #19657
    l10n-zh +1
14. [zh-CN] init translate RtcIcecandidate.type property #19683
    l10n-zh +1
15. [zh-CN] init translate RTCIceCandidate.{relatedAddress,relatedPort} properties #19692
    l10n-zh +1
16. [zh-cn]: create the translation of webRTC RTCPeerConnectionIceEvent introduction #20747
    l10n-zh +1
17. ...more

[tianyeeT]

Hello @jasonren0403 ,
Could you please assist me in updating this task list? Additionally, it may be necessary to move it to a new project page to ensure better tracking. Thanks a lot.