Bump calendar-js from `f5c9865` to `48d0862`

Bumps [calendar-js](https://github.com/nextcloud/calendar-js) from `f5c9865` to `48d0862`.
- [Release notes](https://github.com/nextcloud/calendar-js/releases)
- [Commits](https://github.com/nextcloud/calendar-js/compare/f5c9865d88e6cb19eeb0467709374c78c0d42ec4...48d08628585394475bf2f2acb2c53254a11b4c97

)

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