fix: update new UI picture in the readme file for copilot connector template

[neil-yechenwei]

This PR is to update new UI picture in the readme file for copilot connector template.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.93%. Comparing base (1654717) to head (a5ae2a1).
⚠️ Report is 16 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #15642   +/-   ##
=======================================
  Coverage   92.93%   92.93%           
=======================================
  Files         623      623           
  Lines       38433    38440    +7     
  Branches     7071     7119   +48     
=======================================
+ Hits        35719    35726    +7     
  Misses       1983     1983           
  Partials      731      731           

see 1 file with indirect coverage changes

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