Emphasize that mutiple scopes are allowed in Device flow parameters

[0xTiger]

Why:

In Step 1 of the Device Flow Section on the "Authorizing OAuth Apps" page it's not clear that mutiple scopes can be passed as the description reads "The scope that your app is requesting access to."

Closes:

What's being changed (if available, include any code snippets, screenshots, or gifs):

`scope` | `string` | The scope that your app is requesting access to.

->

`scope` | `string` | A space-delimited list of [scopes](/apps/oauth-apps/building-oauth-apps/scopes-for-oauth-apps).

Check off the following:

• I have reviewed my changes in staging (look for the "Automatically generated comment" and click the links in the "Preview" column to view your latest changes).
• For content changes, I have completed the self-review checklist.

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[github-actions]

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Content directory changes

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Source	Preview	Production	What Changed
apps/oauth-apps/building-oauth-apps/authorizing-oauth-apps.md	fpt ghec ghes@ 3.8 3.7 3.6 3.5 3.4 ghae	fpt ghec ghes@ 3.8 3.7 3.6 3.5 3.4 ghae

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fpt: Free, Pro, Team
ghec: GitHub Enterprise Cloud
ghes: GitHub Enterprise Server
ghae: GitHub AE

[cmwilson21]

@0xTiger Thanks so much for opening a PR! I'll get this triaged for review ⚡

[skedwards88]

Thanks for this improvement! I made one minor suggestion that I will go ahead and incorporate, then we'll get this merged for you.

[cmwilson21]

Closing and reopening to try status checks again

[github-actions]

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