chore(deps-dev): bump neptune-scale from 0.14.1b0 to 0.21.0

Bumps [neptune-scale](https://github.com/neptune-ai/neptune-client-scale) from 0.14.1b0 to 0.21.0.
- [Release notes](https://github.com/neptune-ai/neptune-client-scale/releases)
- [Changelog](https://github.com/neptune-ai/neptune-client-scale/blob/main/CHANGELOG.md)
- [Commits](neptune-ai/neptune-client-scale@0.14.1-beta.0...0.21.0)

---
updated-dependencies:
- dependency-name: neptune-scale
  dependency-version: 0.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

dev_requirements.txt

@@ -8,4 +8,4 @@ pytest-retry
 pytest-timeout
 pytest-xdist
 icecream
-neptune-scale==0.18.0.b1
+neptune-scale==0.21.0