Fix typo on docs

[jpsc]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

Fix minor typo on docs/02-javascript-api.md

[codecov]

Codecov Report

Merging #3852 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3852   +/-   ##
=======================================
  Coverage   97.06%   97.06%           
=======================================
  Files         184      184           
  Lines        6518     6518           
  Branches     1887     1887           
=======================================
  Hits         6327     6327           
  Misses        101      101           
  Partials       90       90           

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[lukastaegert]

👍