Update croniter requirement from <3.0.0,>=1.0.12 to >=1.0.12,<4.0.0

Updates the requirements on [croniter](https://github.com/kiorky/croniter) to permit the latest version.
- [Changelog](https://github.com/kiorky/croniter/blob/master/CHANGELOG.rst)
- [Commits](pallets-eco/croniter@1.0.12...3.0.3)

---
updated-dependencies:
- dependency-name: croniter
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements-client.txt

@@ -3,7 +3,7 @@ asgi-lifespan >= 1.0, < 3.0
 cachetools >= 5.3, < 6.0
 cloudpickle >= 2.0, < 4.0
 coolname >= 1.0.4, < 3.0.0
-croniter >= 1.0.12, < 3.0.0
+croniter >= 1.0.12, < 4.0.0
 exceptiongroup >= 1.0.0
 fastapi >= 0.111.0, < 1.0.0
 fsspec >= 2022.5.0