Update migrating-oauth-apps-to-github-apps.md

[ghost]

These changes are to include the 'Delete OAuth App' step in 'Migrating OAuth Apps to GitHub Apps'

Why:

Closes [issue link]

What's being changed:

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Writer impact (This section is for GitHub staff members only):

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  • I have added the 'writer impact' label
  • I have added a description and/or a video demo of the changes below (e.g. a "before and after video")

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Content directory changes

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Source	Preview	Production	What Changed
content/developers/apps/getting-started-with-apps/migrating-oauth-apps-to-github-apps.md	Modified	Original

[ramyaparimi]

@Pawer1234567
Thanks so much for opening a PR! I'll get this triaged for review ⚡

[skedwards88]

Thanks for this addition! We'll get this merged down for you.

[skedwards88]

@Pawer1234567 you might be interested in this issue, which is related to your changes here: #18052

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