fix: typo in lint config

[waynexia]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

Fix a typo from #3352, which would emit warnings like

I also add a deny lint to prevent the same error. It works like

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR does not require documentation updates.

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8289b0d) 85.42% compared to head (b5dfee9) 84.96%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3358      +/-   ##
==========================================
- Coverage   85.42%   84.96%   -0.46%     
==========================================
  Files         889      889              
  Lines      145477   145477              
==========================================
- Hits       124272   123610     -662     
- Misses      21205    21867     +662