Update peter-evans/create-pull-request action to v7

[elastic-renovate-prod[bot]]

This PR contains the following updates:

Package	Type	Update	Change
peter-evans/create-pull-request	action	major	v6 -> v7

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Release Notes

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

### [`v7`](https://togithub.com/peter-evans/create-pull-request/compare/v6...v7) [Compare Source](https://togithub.com/peter-evans/create-pull-request/compare/v6...v7)

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Configuration

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