Bump vllm from 0.5.0 to 0.5.5 in /examples/large_models/vllm (#3321)

* Bump vllm from 0.5.0 to 0.5.5 in /examples/large_models/vllm

Bumps [vllm](https://github.com/vllm-project/vllm) from 0.5.0 to 0.5.5.
- [Release notes](https://github.com/vllm-project/vllm/releases)
- [Commits](vllm-project/vllm@v0.5.0...v0.5.5)

---
updated-dependencies:
- dependency-name: vllm
  dependency-type: direct:production
...

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

* Update examples/large_models/vllm/requirements.txt

Update vllm dependency to match PT version

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matthias Reso <13337103+mreso@users.noreply.github.com>

examples/large_models/vllm/requirements.txt

@@ -1 +1 @@
-vllm==0.5.0
+vllm==0.6.1.post2