Fix grammar in project showcase documentation

[shubhampadyar31]

This pull request fixes a grammatical error in the GitHub Docs documentation.

The sentence "using of the steps below" has been corrected to "using the steps below".

This is a small documentation-only change that improves the grammar and readability of the content.

[github-actions]

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Table of review links

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The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
account-and-profile/tutorials/using-your-github-profile-to-enhance-your-resume.md	fpt	fpt

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

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[github-actions]

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