Update README.md

[dk-lockdown]

ref: https://github.com/cectc/dbpack/issues/

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6c4f29a) 43.08% compared to head (4962989) 43.08%.

❗ Current head 4962989 differs from pull request most recent head e2ff62e. Consider uploading reports for the commit e2ff62e to get more accurate results

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #284   +/-   ##
=======================================
  Coverage   43.08%   43.08%           
=======================================
  Files          91       91           
  Lines       10588    10588           
=======================================
  Hits         4562     4562           
  Misses       5539     5539           
  Partials      487      487           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.