Bump nvidia-pytriton from 0.2.0 to 0.2.1 (#470)

Bumps [nvidia-pytriton](https://github.com/triton-inference-server/pytriton) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/triton-inference-server/pytriton/releases)
- [Changelog](https://github.com/triton-inference-server/pytriton/blob/main/CHANGELOG.md)
- [Commits](triton-inference-server/pytriton@v0.2.0...v0.2.1)

---
updated-dependencies:
- dependency-name: nvidia-pytriton
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements_test.txt

@@ -4,5 +4,5 @@ pytest-cov==4.1.0
 pytest-timeout==2.1.0
 requests==2.28.2
 websocket-client==1.6.1
-nvidia-pytriton==0.2.0; python_version == '3.8'
+nvidia-pytriton==0.2.1; python_version == '3.8'
 simpervisor==1.0.0