ci: fixup strings in check ci status

[tisonkun]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

TRIVIAL AS IS

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.16%. Comparing base (df13832) to head (587daf2).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3987      +/-   ##
==========================================
- Coverage   85.43%   85.16%   -0.27%     
==========================================
  Files         978      978              
  Lines      169286   169286              
==========================================
- Hits       144622   144174     -448     
- Misses      24664    25112     +448     

[evenyag]

LGTM