Update hacking-on-gitea.en-us.md - misspelled command

[davidsvantesson]

Ironically, misspell-check is misspelled in command to validate swagger.

[codecov-io]

Codecov Report

Merging #8275 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8275      +/-   ##
==========================================
- Coverage   41.55%   41.54%   -0.01%     
==========================================
  Files         492      492              
  Lines       65355    65355              
==========================================
- Hits        27160    27154       -6     
- Misses      34700    34705       +5     
- Partials     3495     3496       +1

Impacted Files	Coverage Δ
modules/sync/unique_queue.go	78.57% <0%> (-10.72%)	⬇️
models/repo_indexer.go	66.27% <0%> (-1.94%)	⬇️
modules/log/event.go	64.61% <0%> (-1.03%)	⬇️
routers/repo/view.go	43.54% <0%> (+1.01%)	⬆️

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[sapk]

make L-GTM work