Update freezegun requirement from ~=1.4 to ~=1.5

Updates the requirements on [freezegun](https://github.com/spulec/freezegun) to permit the latest version.
- [Release notes](https://github.com/spulec/freezegun/releases)
- [Changelog](https://github.com/spulec/freezegun/blob/master/CHANGELOG)
- [Commits](spulec/freezegun@1.4.0...1.5.1)

---
updated-dependencies:
- dependency-name: freezegun
  dependency-type: direct:development
...

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

dev-requirements.txt

@@ -12,7 +12,7 @@ click~=8.1
 ddtrace==2.3.0
 flake8~=7.0
 flaky~=3.8
-freezegun~=1.4
+freezegun~=1.5
 ipdb~=0.13.13
 mypy==1.8.0  # patch updates have historically introduced breaking changes
 pip-tools~=7.3