Bump @prisma/client from 6.3.1 to 6.4.0

Bumps [@prisma/client](https://github.com/prisma/prisma/tree/HEAD/packages/client) from 6.3.1 to 6.4.0.
- [Release notes](https://github.com/prisma/prisma/releases)
- [Commits](https://github.com/prisma/prisma/commits/6.4.0/packages/client)

---
updated-dependencies:
- dependency-name: "@prisma/client"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]