fix typo: web-api -> rtm-api on README.md

[pretty00butt]

Summary

fix typo on README.md

import { RTMClient } from "web-api" -> import { RTMClient } from "rtm-api"

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[CLAassistant]

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[codecov]

Codecov Report

Merging #768 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #768   +/-   ##
=======================================
  Coverage   97.85%   97.85%           
=======================================
  Files          15       15           
  Lines         652      652           
  Branches       26       26           
=======================================
  Hits          638      638           
  Misses         13       13           
  Partials        1        1

Flag	Coverage Δ
#eventsapi	95.62% <ø> (ø)	⬆️
#interactivemessages	99.18% <ø> (ø)	⬆️
#webapi	98.33% <ø> (ø)	⬆️
#webhook	90.69% <ø> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #768 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #768   +/-   ##
=======================================
  Coverage   97.85%   97.85%           
=======================================
  Files          15       15           
  Lines         652      652           
  Branches       26       26           
=======================================
  Hits          638      638           
  Misses         13       13           
  Partials        1        1

Flag	Coverage Δ
#eventsapi	95.62% <ø> (ø)	⬆️
#interactivemessages	99.18% <ø> (ø)	⬆️
#webapi	98.33% <ø> (ø)	⬆️
#webhook	90.69% <ø> (ø)	⬆️

---

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 961f9d8...fdb151c. Read the comment docs.

[aoberoi]

thanks @the6thm0nth! would you mind signing the CLA?

[pretty00butt]

Sure, I did 🙏