Fix various typos in docs

[qwerty287]

Fixes some typos in the docs.

[codecov-commenter]

Codecov Report

Merging #17844 (71c9d0d) into main (9defddb) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #17844      +/-   ##
==========================================
- Coverage   45.54%   45.53%   -0.01%     
==========================================
  Files         809      809              
  Lines       90059    90059              
==========================================
- Hits        41019    41011       -8     
- Misses      42484    42495      +11     
+ Partials     6556     6553       -3     

Impacted Files	Coverage Δ
modules/charset/charset.go	71.71% <0.00%> (-4.05%)	⬇️
modules/queue/workerpool.go	49.23% <0.00%> (-1.91%)	⬇️
modules/log/event.go	60.64% <0.00%> (-1.86%)	⬇️
modules/queue/queue_channel.go	95.00% <0.00%> (-1.67%)	⬇️
models/repo_list.go	78.40% <0.00%> (-0.80%)	⬇️
services/pull/pull.go	41.78% <0.00%> (-0.41%)	⬇️
modules/queue/queue_bytefifo.go	59.88% <0.00%> (+0.59%)	⬆️
models/issue_comment.go	53.25% <0.00%> (+0.84%)	⬆️
modules/git/utils.go	70.83% <0.00%> (+2.77%)	⬆️
modules/git/repo_base_nogogit.go	85.71% <0.00%> (+2.85%)	⬆️

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