build(deps): bump caikit-nlp from 0.4.18 to 0.5.3

Bumps [caikit-nlp](https://github.com/caikit/caikit-nlp) from 0.4.18 to 0.5.3.
- [Release notes](https://github.com/caikit/caikit-nlp/releases)
- [Commits](caikit/caikit-nlp@v0.4.18...v0.5.3)

---
updated-dependencies:
- dependency-name: caikit-nlp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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