Bump vllm from 0.14.1 to 0.20.0

Bumps [vllm](https://github.com/vllm-project/vllm) from 0.14.1 to 0.20.0.
- [Release notes](https://github.com/vllm-project/vllm/releases)
- [Changelog](https://github.com/vllm-project/vllm/blob/main/RELEASE.md)
- [Commits](vllm-project/vllm@v0.14.1...v0.20.0)

---
updated-dependencies:
- dependency-name: vllm
  dependency-version: 0.20.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -39,7 +39,7 @@ dependencies = [
   "tiktoken==0.9.0",
   "transformers==4.53.0",
   "trl==0.17.0",
-  "vllm==0.14.1",
+  "vllm==0.20.0",
 ]
 
 [project.urls]

requirements.txt

@@ -15,4 +15,4 @@ submitit
 tiktoken==0.9.0
 transformers==4.53.0
 trl==0.17.0
-vllm==0.14.1
+vllm==0.20.0