fix: infinite loop in UserList component

[andypols]

Summary

Fixes an infinite loop in the UserList component that was causing excessive API requests and triggering rate limit errors (HTTP 429).

Fix

Added an empty dependency array [] so the effect runs only once on mount.

[netlify]

✅ Deploy Preview for endearing-brigadeiros-63f9d0 canceled.

Name	Link
🔨 Latest commit	16945f9
🔍 Latest deploy log	https://app.netlify.com/projects/endearing-brigadeiros-63f9d0/deploys/68f9f4e83367a00008b37132

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.64%. Comparing base (f216ae6) to head (16945f9).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1255   +/-   ##
=======================================
  Coverage   82.64%   82.64%           
=======================================
  Files          70       70           
  Lines        3007     3007           
  Branches      501      501           
=======================================
  Hits         2485     2485           
  Misses        419      419           
  Partials      103      103           

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[jescalada]

LGTM! I found the same fix for the same issue in #1256 😃