Update peter-evans/create-pull-request action to v8

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
peter-evans/create-pull-request	action	major	v7 → v8

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Warning

Some dependencies could not be looked up. Check the warning logs for more information.

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Release Notes

peter-evans/create-pull-request (peter-evans/create-pull-request)

v8

Compare Source

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Configuration

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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[github-actions]

This pull request has been automatically marked as stale because it has not had activity in 3 months. It will be closed in 7 days if no further activity occurs.
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If these changes are still relevant then please comment and tag @mantidproject/gatekeepers to highlight that it needs to have a reviewer assigned.

[github-actions]

This pull request has been closed automatically. If these changes are still relevant then please re-open this pull request with a comment and tag @mantidproject/gatekeepers to highlight it needs to have a reviewer assigned.

[renovate]

Renovate Ignore Notification

Because you closed this PR without merging, Renovate will ignore this update. You will not get PRs for any future 8.x releases. But if you manually upgrade to 8.x then Renovate will re-enable minor and patch updates automatically.

If you accidentally closed this PR, or if you changed your mind: rename this PR to get a fresh replacement PR.