Update Readme.md - Add January Meeting and note

Readme.md

 # Meetings
 
-The final meeting of 2020 will be December 16th.
+The first meeting of 2021 will be January 6th at 4:00PM Eastern.
 
 Meeting Notes are required for all Advisory groups and posted in the wiki. 
 [Running list of Agendas and Notes](https://opensource.ieee.org/technical-advisory-group/meetings/-/wikis/Meeting-notes )
 
 | Meeting Date | Meeting Time |
 | ------ | ------ |
+| Jnaury 6th 2021 | 4:00 PM Eastern |
 | December 16th 2020 | 4:00 PM Eastern |
 | December 2nd 2020 | 4:00 PM Eastern |
 | November 11th 2020 | 4:00 PM Eastern |