Fix typo in comment in mapping.go

[fenggw-fnst]

Signed-off-by: Guangwen Feng fenggw-fnst@cn.fujitsu.com

Which problem is this PR solving?

• Fix a typo

Short description of the changes

• Fix typo in comment in mapping.go

[codecov]

Codecov Report

Merging #2939 (116b619) into master (c5642b7) will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2939      +/-   ##
==========================================
+ Coverage   95.90%   95.97%   +0.07%     
==========================================
  Files         223      223              
  Lines        9712     9712              
==========================================
+ Hits         9314     9321       +7     
+ Misses        328      323       -5     
+ Partials       70       68       -2     

Impacted Files	Coverage Δ
plugin/storage/es/mappings/mapping.go	100.00% <ø> (ø)
plugin/storage/integration/integration.go	77.34% <0.00%> (-0.56%)	⬇️
...lugin/sampling/strategystore/adaptive/processor.go	100.00% <0.00%> (+0.92%)	⬆️
cmd/collector/app/server/zipkin.go	76.92% <0.00%> (+3.84%)	⬆️
cmd/query/app/static_handler.go	96.77% <0.00%> (+4.03%)	⬆️

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[joe-elliott]

Thanks for the fix!