Fix invalid tree conversion

[hackerwins]

What this PR does / why we need it?

Fix invalid tree conversion

A script error occurred when creating a snapshot due to a typo in the converter during migrating to connectRPC. This commit fixes the typo.

@JOOHOJANG Thanks for your reporting.

Any background context you want to provide?

What are the relevant tickets?

Fixes #

Checklist

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (a882a68) 82.03% compared to head (8adb93b) 82.03%.

Files	Patch %	Lines
src/api/converter.ts	0.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #719   +/-   ##
=======================================
  Coverage   82.03%   82.03%           
=======================================
  Files          57       57           
  Lines        4231     4231           
  Branches      828      828           
=======================================
  Hits         3471     3471           
  Misses        502      502           
  Partials      258      258           

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