Update text capitalization

[dvdrip]

Description

Pre-Submission Checklist

Common mandatory requirements

• This pull request targets the master branch of freeCodeCamp.
• Branch starts with either fix/, feature/, or translate/
  (e.g. fix/signin-issue)
• Reviewed necessary guidelines in CONTRIBUTING.md.

By submitting this pull request, I have verified the following:

• Added descriptive name to pull request. (mandatory)

  Your PR should NOT be called Update index.md, since it does not help the maintainer understand what has been changed.

  Good Guide PR title examples:

  fix(guide): Git - edit Git Commit article
  feat(guide): PHP - create PHP section and add Data Structures article

  Good Coding challenge PR title examples:

  fix(coding): add tests to Basic HTML challenge
  fix(coding): update instructions to CSS Grid challenge

  Good Learning platform PR title examples:

  fix(platform): fixed sign in api
  fix(platform): removed css from editor

Issues Closures

• Addressed currently open issue. (replace XXXXX with an issue no in next line)

Closes #XXXXX

Since this change is a copy edit or translation for Guide articles or Coding Challenges:

• I confirm no plagiarized, duplicate, or repetitive content that has been directly copied from another source.
• I am adding only https links to external sources.
• I am not adding short links instead of full URLs to webpages.
• I have followed the recomended style guides for the copy edit.

Requirements, for changes which are NOT simple copy editing or translations:

You may skip the below ONLY if your changes do not touch tests, ui logic, api-server, etc. Your PR may not be accepted, if you did not meet these mandatory requirements. Simply put, we can't assume it will work if we never saw it working.

Since this change adds, updates or removes coding challenge tests:

• I completed the coding challenge locally, and the changes look good.
• Other tests or user stories in instructions are not affected.

Since this change is for the Learning platform (UI, logic, etc.):

• I confirm my changes look good by running freeCodeCamp locally.
• All new and existing tests pass the command npm test.

(Optional) Additional Context and Screenshots:

[honmanyau]

@dvdcorgi Thank you very much for submitting a pull request (PR). I think this one is okay and can be merged because title case is preferred. In the future, please keep in mind that minor formatting/grammatical changes can be combined into a single PR because it makes things a bit easier for maintainers and contributors!

In any case, congratulations on having your first PR accepted here. ☀️