Adjust `.go` style

[jsoref]

Description

Small grammatical fixes...

Two items are atypical corrections...

Two rules with references:

Write out small numbers (unless they are code)

See https://www.scribendi.com/academy/articles/when_to_spell_out_numbers_in_writing.en.html#:~:text=Writing%20Small%20and%20Large%20Numbers,ten%29%20are%20written%20as%20numerals%2e

Should be ; otherwise or . Otherwise

https://study.com/learn/lesson/otherwise-in-a-sentence.html

Readiness checklist

• [ ] I added/updated unit tests (and they pass).
• [ ] I added/updated integration/compatibility tests (and they pass).
• [ ] I added/updated comments and checked rendering.
• [ ] I made spot refactorings.
• [ ] I updated user documentation.
• [ ] I ran task all, and it passed.
• [ ] I ensured that PR title is good enough for the changelog.
• [ ] (for maintainers only) I set Reviewers (@FerretDB/core), Milestone (Next), Labels, Project and project's Sprint fields.
• [ ] I marked all done items in this checklist.

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 50.43%. Comparing base (ef9934e) to head (5f04c2c). :warning: Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5493   +/-   ##
=======================================
  Coverage   50.43%   50.43%           
=======================================
  Files         172      172           
  Lines       15066    15066           
=======================================
+ Hits         7598     7599    +1     
  Misses       7036     7036           
+ Partials      432      431    -1     

Files with missing lines	Coverage Δ
build/version/version.go	76.42% <100.00%> (ø)
integration/integration.go	88.65% <ø> (-0.60%)	:arrow_down:
internal/util/ctxutil/ctxutil.go	86.04% <ø> (ø)

... and 1 file with indirect coverage changes

Flag	Coverage Δ
integration	51.61% <0.00%> (-0.02%)	:arrow_down:
mongodb	10.84% <0.00%> (ø)
mongodb-1	10.84% <0.00%> (ø)
postgresql	50.76% <0.00%> (-0.11%)	:arrow_down:
postgresql-1	40.13% <0.00%> (-0.26%)	:arrow_down:
postgresql-2	39.39% <0.00%> (ø)
postgresql-3	40.75% <0.00%> (-0.11%)	:arrow_down:
postgresql-4	39.70% <0.00%> (-0.15%)	:arrow_down:
postgresql-5	39.22% <0.00%> (-0.10%)	:arrow_down:
unit	16.00% <100.00%> (+0.02%)	:arrow_up:
yugabytedb	47.46% <0.00%> (-0.05%)	:arrow_down:
yugabytedb-1	36.25% <0.00%> (-0.52%)	:arrow_down:
yugabytedb-2	35.56% <0.00%> (-0.36%)	:arrow_down:
yugabytedb-3	37.80% <0.00%> (+0.33%)	:arrow_up:
yugabytedb-4	35.61% <0.00%> (-0.10%)	:arrow_down:
yugabytedb-5	36.57% <0.00%> (-0.16%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
clientconn	57.93% <ø> (ø)
dataapi	6.61% <ø> (ø)
documentdb	19.83% <ø> (ø)
handler	76.38% <ø> (+0.07%)	:arrow_up:

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