Updates queries in README

[JBAhire]

• Updated verify trace exists as per discussion with @adriancole and @skjindal93 .
• Removed get list of traces query.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@7c18898). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #22   +/-   ##
=======================================
  Coverage        ?   81.25%           
  Complexity      ?        2           
=======================================
  Files           ?        2           
  Lines           ?       32           
  Branches        ?        0           
=======================================
  Hits            ?       26           
  Misses          ?        6           
  Partials        ?        0           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7c18898...737569b. Read the comment docs.