build(deps): bump label-studio-sdk in /requirements (#701)

Bumps [label-studio-sdk](https://github.com/heartexlabs/label-studio-sdk) from 0.0.27 to 0.0.28.
- [Commits](https://github.com/heartexlabs/label-studio-sdk/commits)

---
updated-dependencies:
- dependency-name: label-studio-sdk
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements/test.txt

@@ -37,7 +37,7 @@ idna==3.4
     #   yarl
 iniconfig==2.0.0
     # via pytest
-label-studio-sdk==0.0.27
+label-studio-sdk==0.0.28
     # via -r test.in
 label-studio-tools==0.0.2
     # via label-studio-sdk