fix: warnings from golangci-lint: S1009 should omit nil check; non-constant format string in call to fmt.Errorf

[chengfang]

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 73.46%. Comparing base (8c9e269) to head (3f75025).

Files with missing lines	Patch %	Lines
pkg/log/log.go	83.33%	1 Missing :warning:

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #849   +/-   ##
=======================================
  Coverage   73.46%   73.46%           
=======================================
  Files          31       31           
  Lines        3128     3128           
=======================================
  Hits         2298     2298           
  Misses        694      694           
  Partials      136      136           

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.