Fixed typo.

[ericyangpan]

Checklist

• npm test passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

None.

Description of change

Fixed typo of Princeple to Principle

[codecov]

Codecov Report

Merging #2961 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2961   +/-   ##
=======================================
  Coverage   99.75%   99.75%           
=======================================
  Files          29       29           
  Lines         826      826           
=======================================
  Hits          824      824           
  Misses          2        2

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