Fix issue with checkbox checking and unicode

[KN4CK3R]

fix #16147

It would be better if goldmark could output the character position but it fixes the issue.

[a1012112796]

👍

[codecov-commenter]

Codecov Report

Merging #16148 (5a52c76) into main (15fbf23) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #16148      +/-   ##
==========================================
+ Coverage   44.57%   44.60%   +0.02%     
==========================================
  Files         699      699              
  Lines       82765    82765              
==========================================
+ Hits        36896    36918      +22     
+ Misses      39888    39868      -20     
+ Partials     5981     5979       -2     

Impacted Files	Coverage Δ
routers/api/v1/repo/pull.go	28.74% <0.00%> (+0.59%)	⬆️
modules/queue/workerpool.go	55.34% <0.00%> (+1.52%)	⬆️
modules/log/file.go	75.39% <0.00%> (+1.58%)	⬆️
modules/notification/mail/mail.go	40.00% <0.00%> (+2.10%)	⬆️
modules/queue/manager.go	68.36% <0.00%> (+2.82%)	⬆️
modules/charset/charset.go	75.75% <0.00%> (+4.04%)	⬆️
services/mailer/mail_comment.go	85.18% <0.00%> (+7.40%)	⬆️

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