Set minimum version of cognite-sdk to 7.87.0 in pyproject.toml (#2232)

# Description

With the addition of the StreamCRUD, toolkit currently crashes if the
users does not also upde `cognite-sdk` due to the import of the
StreamsAcl dataclass. This PR updates the minimum version of
`cognite-sdk` to `7.87.0` to ensure the dependency is automatically
updated.

## Changelog

- [x] Patch
- [ ] Skip

## cdf

### Changed

- Set minimum version of cognite-sdk to `7.87.0` in pyproject.toml

## templates

No changes.

Co-authored-by: Magnus Schjølberg <magnus.schjolberg@cognitedata.com>
