fix Unknown setting charset for clickhouse driver

[gqcn]

No description provided.

[codecov-commenter]

Codecov Report

Base: 79.82% // Head: 79.84% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (56ec7ef) compared to base (0876e00).
Patch coverage: 50.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2375      +/-   ##
==========================================
+ Coverage   79.82%   79.84%   +0.01%     
==========================================
  Files         589      589              
  Lines       48836    48836              
==========================================
+ Hits        38984    38991       +7     
+ Misses       7870     7862       -8     
- Partials     1982     1983       +1     

Flag	Coverage Δ
go-1.15-386	79.89% <50.00%> (+0.01%)	⬆️
go-1.15-amd64	79.89% <50.00%> (+0.02%)	⬆️
go-1.16-386	79.89% <50.00%> (+0.03%)	⬆️
go-1.16-amd64	79.86% <50.00%> (-0.01%)	⬇️
go-1.17-386	79.87% <50.00%> (+0.01%)	⬆️
go-1.17-amd64	79.88% <50.00%> (-0.01%)	⬇️
go-1.18-386	79.82% <50.00%> (+0.02%)	⬆️
go-1.18-amd64	79.81% <50.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
contrib/drivers/clickhouse/clickhouse.go	73.82% <50.00%> (ø)
os/gfpool/gfpool_file.go	68.57% <0.00%> (+2.85%)	⬆️
os/gfsnotify/gfsnotify_watcher_loop.go	83.19% <0.00%> (+5.04%)	⬆️

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