Update 3.registering-abilities.md

[mujuonly]

Text correction

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (trunk@0fd2baa). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff            @@
##             trunk      #46   +/-   ##
========================================
  Coverage         ?   89.82%           
  Complexity       ?       94           
========================================
  Files            ?        7           
  Lines            ?      511           
  Branches         ?        0           
========================================
  Hits             ?      459           
  Misses           ?       52           
  Partials         ?        0           

Flag	Coverage Δ
unit	89.82% <ø> (?)

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

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[gziolo]

Good catch, thank you!