Update fakeredis requirement in /.dev in the packages group (#632)

Updates the requirements on [fakeredis](https://github.com/cunla/fakeredis-py) to permit the latest version.

Updates `fakeredis` to 2.31.0
- [Release notes](https://github.com/cunla/fakeredis-py/releases)
- [Commits](cunla/fakeredis-py@v2.30.0...v2.31.0)

---
updated-dependencies:
- dependency-name: fakeredis
  dependency-version: 2.31.0
  dependency-type: direct:development
  dependency-group: packages
...

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.dev/requirements_dev.txt

@@ -1,5 +1,5 @@
 debugpy>=1.8.0
-fakeredis~=2.30
+fakeredis~=2.31
 httpx~=0.28.1
 invoke~=2.2
 pre-commit~=4.3