Update REVIEW.md instructions for localization update PRs

[Nateowami]

Devin has been commenting on the "update from Crowdin" PRs saying the localization strings shouldn't be updated due to instructions in this file (before the instruction I think it was complaining about developers not updating them). This attempts to steer it away from that, while also telling it what we do care about (that variables and such match in the translations).

---

This change is 

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.03%. Comparing base (b1f7a61) to head (7995dad).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3842   +/-   ##
=======================================
  Coverage   81.03%   81.03%           
=======================================
  Files         630      630           
  Lines       40577    40577           
  Branches     6574     6555   -19     
=======================================
  Hits        32880    32880           
- Misses       6666     6679   +13     
+ Partials     1031     1018   -13     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[marksvc]

@marksvc reviewed 1 file and all commit messages, and made 1 comment.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on Nateowami).

---

REVIEW.md line 22 at r1 (raw file):
What do you think about changing

to make sure the translators didn't mess them up.

to something like

to make sure they are correctly preserved.

?