chore(deps): bump torch in /backend/python/vllm in the pip group

Bumps the pip group in /backend/python/vllm with 1 update: [torch](https://github.com/pytorch/pytorch).


Updates `torch` from 2.7.0 to 2.7.1
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/main/RELEASE.md)
- [Commits](https://github.com/pytorch/pytorch/compare/v2.7.0...v2.7.1)

---
updated-dependencies:
- dependency-name: torch
  dependency-version: 2.7.1
  dependency-type: direct:production
  dependency-group: pip
...

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

backend/python/vllm/requirements-cpu.txt

@@ -1,3 +1,3 @@
 accelerate
-torch==2.7.0
+torch==2.7.1
 transformers

backend/python/vllm/requirements-cublas11.txt

@@ -1,5 +1,5 @@
 --extra-index-url https://download.pytorch.org/whl/cu118
 accelerate
-torch==2.7.0+cu118
+torch==2.7.1
 transformers
 bitsandbytes

backend/python/vllm/requirements-cublas12.txt

@@ -1,4 +1,4 @@
 accelerate
-torch==2.7.0
+torch==2.7.1
 transformers
 bitsandbytes

backend/python/vllm/requirements-intel.txt

@@ -2,7 +2,7 @@
 --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/xpu/us/
 intel-extension-for-pytorch==2.7.10+xpu
 accelerate
-torch==2.7.0+xpu
+torch==2.7.1
 transformers
 optimum[openvino]
 setuptools