Bump vllm from 0.6.1.post2 to 0.7.0 in /examples/large_models/vllm

Bumps [vllm](https://github.com/vllm-project/vllm) from 0.6.1.post2 to 0.7.0.
- [Release notes](https://github.com/vllm-project/vllm/releases)
- [Commits](vllm-project/vllm@v0.6.1.post2...v0.7.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/large_models/vllm/requirements.txt

@@ -1 +1 @@
-vllm==0.6.1.post2
+vllm==0.7.0