Update Drupal Core to v10.3.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
drupal/core-composer-scaffold (source)	10.2.7 -> 10.3.0
drupal/core-dev-pinned	10.2.7 -> 10.3.0
drupal/core-project-message (source)	10.2.7 -> 10.3.0
drupal/core-recommended	10.2.7 -> 10.3.0

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Release Notes

drupal/core-composer-scaffold (drupal/core-composer-scaffold)

### [`v10.3.0`](https://togithub.com/drupal/core-composer-scaffold/compare/10.2.7...10.3.0) [Compare Source](https://togithub.com/drupal/core-composer-scaffold/compare/10.2.7...10.3.0)

drupal/core-dev-pinned (drupal/core-dev-pinned)

### [`v10.3.0`](https://togithub.com/drupal/core-dev-pinned/compare/10.2.7...10.3.0) [Compare Source](https://togithub.com/drupal/core-dev-pinned/compare/10.2.7...10.3.0)

drupal/core-project-message (drupal/core-project-message)

### [`v10.3.0`](https://togithub.com/drupal/core-project-message/compare/10.2.7...10.3.0) [Compare Source](https://togithub.com/drupal/core-project-message/compare/10.2.7...10.3.0)

drupal/core-recommended (drupal/core-recommended)

### [`v10.3.0`](https://togithub.com/drupal/core-recommended/compare/10.2.7...10.3.0) [Compare Source](https://togithub.com/drupal/core-recommended/compare/10.2.7...10.3.0)

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