fix(docs): corrects typo in project documentation

[plan-do-break-fix]

Description

Changes are restricted in scope to docs.
Typo corrected: publically => publicly

Motivation and Context

Change is in agreement with Standard American English.

How Has This Been Tested?

n/a

Screenshots (if appropriate):

Checklist

My PR contains...

• [x ] No code changes (src/ is unmodified: changes to documentation, CI, metadata, etc.)
• Dependency changes (any modification to dependencies in package.json)
• Bug fixes (non-breaking change which fixes an issue)
• Improvements (misc. changes to existing features)
• Features (non-breaking change which adds functionality)

My changes...

• are breaking changes to a public API (config options, System API, major UI change, etc).
• are breaking changes to a private API (Redux, component props, utility functions, etc.).
• are breaking changes to a developer API (npm script behavior changes, new dev system dependencies, etc).
• [x ] are not breaking changes.

Documentation

• My changes do not require a change to the project documentation.
• [x ] My changes require a change to the project documentation.
• [x ] If yes to above: I have updated the documentation accordingly.

Automated tests

• [x ] My changes can not or do not need to be tested.
• My changes can and should be tested by unit and/or integration tests.
• If yes to above: I have added tests to cover my changes.
• If yes to above: I have taken care to cover edge cases in my tests.
• All new and existing tests passed.

[tim-lai]

@plan-do-break-fix PR merged! Thanks for the documentation fix!