fix: revise kfk groupid setting

[Yisaer]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 34.78261% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.82%. Comparing base (a4c5685) to head (a5347a7).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
extensions/impl/kafka/source.go	34.78%	12 Missing and 3 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4009   +/-   ##
=======================================
  Coverage   71.81%   71.82%           
=======================================
  Files         460      460           
  Lines       53190    53201   +11     
=======================================
+ Hits        38197    38207   +10     
- Misses      12052    12056    +4     
+ Partials     2941     2938    -3     

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