Bump symfony/asset-mapper from 6.4.26 to 6.4.27 in /web/landing

Bumps [symfony/asset-mapper](https://github.com/symfony/asset-mapper) from 6.4.26 to 6.4.27.
- [Release notes](https://github.com/symfony/asset-mapper/releases)
- [Changelog](https://github.com/symfony/asset-mapper/blob/7.3/CHANGELOG.md)
- [Commits](symfony/asset-mapper@v6.4.26...v6.4.27)

---
updated-dependencies:
- dependency-name: symfony/asset-mapper
  dependency-version: 6.4.27
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]