Fix typo in scroll to top feature

[tlylt]

What is the purpose of this pull request?

• Documentation update
• Bug fix
• Feature addition or enhancement
• Code maintenance
• DevOps
• Improve developer experience
• Others, please explain:

Overview of changes:
Fix a typo on the scroll-to-top button usage, closes #2342

Anything you'd like to highlight/discuss:
nil

Testing instructions:
https://deploy-preview-2374--markbind-master.netlify.app/userguide/components/navigation#scroll-to-top-button

Proposed commit message: (wrap lines at 72 characters)
Fix typo in scroll to top feature

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Checklist: ☑️

• Updated the documentation for feature additions and enhancements
• Added tests for bug fixes or features
• Linked all related issues
• No unrelated changes

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Reviewer checklist:

Indicate the SEMVER impact of the PR:

• Major (when you make incompatible API changes)
• Minor (when you add functionality in a backward compatible manner)
• Patch (when you make backward compatible bug fixes)

At the end of the review, please label the PR with the appropriate label: r.Major, r.Minor, r.Patch.

Breaking change release note preparation (if applicable):

• To be included in the release note for any feature that is made obsolete/breaking

Give a brief explanation note about:

• what was the old feature that was made obsolete
• any replacement feature (if any), and
• how the author should modify his website to migrate from the old feature to the replacement feature (if possible).

[codecov]

Codecov Report

Merging #2374 (5d43ac6) into master (5a73c80) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
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  Coverage   45.66%   45.66%           
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  Files         123      123           
  Lines        5199     5199           
  Branches     1097     1097           
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  Hits         2374     2374           
  Misses       2506     2506           
  Partials      319      319           

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[ong6]

Lgtm