Pr js this

[EmbedTux]

Description

Fixes some typo and apply format fixes to examples of javascript/concept/this/this.md.

Issue Solved

Type of Change

• Editing an existing entry, fixing a typo

Checklist

• [x] All writings are my own.
• [x] My entry follows the Codecademy Docs style guide.
• [x] My changes generate no new warnings.
• [x] I have performed a self-review of my own writing and code.
• [x] I have checked my entry and corrected any misspellings.
• [x] I have made corresponding changes to the documentation if needed.
• [x] I have confirmed my changes are not being pushed from my forked main branch.
• [x] I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• [x] I have linked any issues that are relevant to this PR in the Issues Solved section.

[CLAassistant]

All committers have signed the CLA.

[Sriparno08]

Hey @EmbedTux, please sign the 'Contributor License Agreement' by clicking on the link provided in the message above from @CLAassistant.

[EmbedTux]

Hello @Sriparno08, I signed the agreement as requested.

[github-actions[bot]]

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