Fix typo in contributing documentation

[jrmanes]

Description

Hello team!

Following the CONTRIBUTING.md, I tried to ran task build-release but looks like this command doesn't exists anymore, and should be build-production.

Cheers!

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.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #3507 (60c9887) into main (bfa7300) will increase coverage by 4.65%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3507      +/-   ##
==========================================
+ Coverage   69.38%   74.04%   +4.65%     
==========================================
  Files         420      426       +6     
  Lines       26645    26963     +318     
==========================================
+ Hits        18488    19965    +1477     
+ Misses       6909     5793    -1116     
+ Partials     1248     1205      -43     

see 110 files with indirect coverage changes

Flag	Coverage Δ
filter-true	70.67% <ø> (+1.29%)	⬆️
integration	70.67% <ø> (+1.29%)	⬆️
mongodb-1	4.53% <ø> (ø)
pg-1	39.20% <ø> (ø)
pg-2	42.28% <ø> (-0.04%)	⬇️
pg-3	42.73% <ø> (ø)
postgresql-1	11.06% <ø> (-6.22%)	⬇️
postgresql-2	15.87% <ø> (+0.27%)	⬆️
postgresql-3	18.79% <ø> (-1.29%)	⬇️
sort-false	70.67% <ø> (+1.29%)	⬆️
sqlite-1	38.34% <ø> (-0.04%)	⬇️
sqlite-2	41.42% <ø> (?)
sqlite-3	42.11% <ø> (+<0.01%)	⬆️
unit	25.68% <ø> (?)

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

[AlekSi]

Thank you!

[rumyantseva]

Thanks for contributing!