ci: add requests to ci docker container (#1370)

<!-- .github/pull_request_template.md -->

## 📌 Description

Fix the CI error in
#1369

## 🔍 Related Issues

#1369

## 🚀 Pull Request Checklist

Thank you for contributing to FlashInfer! Before we review your pull
request, please make sure the following items are complete.

### ✅ Pre-commit Checks

- [x] I have installed `pre-commit` by running `pip install pre-commit`
(or used your preferred method).
- [x] I have installed the hooks with `pre-commit install`.
- [x] I have run the hooks manually with `pre-commit run --all-files`
and fixed any reported issues.

> If you are unsure about how to set up `pre-commit`, see [the
pre-commit documentation](https://pre-commit.com/).

## 🧪 Tests

- [x] Tests have been added or updated as needed.
- [x] All tests are passing (`unittest`, etc.).

## Reviewer Notes

<!-- Optional: anything you'd like reviewers to focus on, concerns, etc.
-->

Co-authored-by: yzh119 <[email protected]>

Author: yzh119

docker/install/install_python_packages.sh

@@ -20,5 +20,5 @@ set -e
 set -u
 
 pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu128
-pip3 install ninja pytest numpy scipy build pynvml cuda-python einops nvidia-nvshmem-cu12
+pip3 install requests ninja pytest numpy scipy build pynvml cuda-python einops nvidia-nvshmem-cu12
 pip3 install 'nvidia-cudnn-frontend>=1.13.0' 'nvidia-cudnn-cu12>=9.11.0.98'