Update requests requirement in /diff-generator

Updates the requirements on [requests](https://github.com/psf/requests) to permit the latest version.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.31.0...v2.33.1)

---
updated-dependencies:
- dependency-name: requests
  dependency-version: 2.33.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

diff-generator/requirements.txt

@@ -1,3 +1,3 @@
-requests>=2.31,<3
+requests>=2.33.1,<3
 awslambdaric>=2.0.7,<5
 boto3>=1.28.70,<2