Update "using copilot to work on an issue" docs

[dainiuspr]

Why:

Change assigneeIds with actorIds, because using assigneeIds, returns an error:

gh: Argument 'actorIds' on InputObject 'ReplaceActorsForAssignableInput' is required. Expected type [ID!]!
InputObject 'ReplaceActorsForAssignableInput' doesn't accept argument 'assigneeIds'

Closes:

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

Using Copilot to work on an issue documentation.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[Copilot]

Pull Request Overview

This PR updates the GraphQL example in the "Using Copilot to work on an issue" guide to use the correct actorIds argument instead of the outdated assigneeIds.

• Swapped assigneeIds for actorIds in the mutation input.

Comments suppressed due to low confidence (1)

content/copilot/using-github-copilot/coding-agent/using-copilot-to-work-on-an-issue.md:105

• Ensure any descriptive text above or around this snippet is also updated to reference actorIds rather than assigneeIds, and scan the doc for other instances of assigneeIds to replace.

mutation {

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Source	Review	Production	What Changed
copilot/using-github-copilot/coding-agent/using-copilot-to-work-on-an-issue.md	fpt ghec	fpt ghec

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[Sharra-writes]

Thanks for opening a PR! I'll get this triaged for review.

[github-actions]

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