update doc for tls

[haorenfsa]

part of : milvus-io/milvus#36864

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.69%. Comparing base (e2c812a) to head (6381f26).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #215   +/-   ##
=======================================
  Coverage   80.69%   80.69%           
=======================================
  Files          56       56           
  Lines        6233     6233           
=======================================
  Hits         5030     5030           
  Misses       1014     1014           
  Partials      189      189           

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[sre-ci-robot]

New changes are detected. LGTM label has been removed.