fix: add missing bullet point for Open Symbol by Name in README table of contents

[bronachfalls]

Summary

• Fixes a missing bullet point in the README table of contents for "Open Symbol by Name"

Test plan

• No functional changes — documentation only

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.77%. Comparing base (3070b07) to head (11d76c9).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #924   +/-   ##
=======================================
  Coverage   77.77%   77.77%           
=======================================
  Files           1        1           
  Lines           9        9           
=======================================
  Hits            7        7           
  Misses          2        2           

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