doc(sdk): Remove a dead reference in the doc

[Hywan]

This patch removes the reference to Update, that is no longer required.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.60%. Comparing base (10ff5d0) to head (094b31f).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5849   +/-   ##
=======================================
  Coverage   88.60%   88.60%           
=======================================
  Files         361      361           
  Lines      102294   102294           
  Branches   102294   102294           
=======================================
+ Hits        90637    90638    +1     
+ Misses       7438     7436    -2     
- Partials     4219     4220    +1     

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

[codspeed-hq]

CodSpeed Performance Report

Merging #5849 will not alter performance

_{Comparing Hywan:doc-sdk-event-cache-dead-ref (094b31f) with main (10ff5d0)}

Summary

✅ 50 untouched