chore(deps): bump torch from 2.5.1 to 2.7.1+cu118 in /tests/e2e

Bumps torch from 2.5.1 to 2.7.1+cu118.

---
updated-dependencies:
- dependency-name: torch
  dependency-version: 2.7.1+cu118
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tests/e2e/mnist_pip_requirements.txt

@@ -1,5 +1,5 @@
 --extra-index-url https://download.pytorch.org/whl/cu118
-torch==2.5.1
+torch==2.7.1+cu118
 torchvision==0.20.1
 pytorch_lightning==1.9.5
 torchmetrics==0.9.1