build(deps-dev): bump the devdependencies group with 1 update (#1279)

Bumps the devdependencies group with 1 update: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro).


Updates `astro` from 4.4.6 to 4.5.1
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/[email protected]/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: devdependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

apps/github-pages/package.json

@@ -7,7 +7,7 @@
 		"@astrojs/check": "0.5.6",
 		"@astrojs/svelte": "5.2.0",
 		"@guardian/consent-management-platform": "13.12.0",
-		"astro": "4.4.6",
+		"astro": "4.5.1",
 		"svelte": "4.2.12",
 		"typescript": "5.3.3"
 	}