fix(server): correct typo in event-dispatch error log

[aslafy-z]

Fix a typo in the event-dispatch server module in error logs.

[codecov]

Codecov Report

Merging #6688 (592bdee) into master (9c76cc3) will not change coverage.
The diff coverage is 0.00%.

❗ Current head 592bdee differs from pull request most recent head 79255b6. Consider uploading reports for the commit 79255b6 to get more accurate results

@@           Coverage Diff           @@
##           master    #6688   +/-   ##
=======================================
  Coverage   48.67%   48.67%           
=======================================
  Files         262      262           
  Lines       18983    18983           
=======================================
  Hits         9240     9240           
+ Misses       8708     8707    -1     
- Partials     1035     1036    +1     

Impacted Files	Coverage Δ
server/event/dispatch/operation.go	89.65% <0.00%> (ø)
cmd/argo/commands/get.go	58.30% <0.00%> (-0.59%)	⬇️
workflow/metrics/server.go	19.29% <0.00%> (+3.50%)	⬆️

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