pip prod(deps): update distributed requirement from <2023.5 to <2023.6

Updates the requirements on [distributed](https://github.com/dask/distributed) to permit the latest version.
- [Changelog](https://github.com/dask/distributed/blob/main/docs/release-procedure.md)
- [Commits](dask/distributed@1.1.0...2023.5.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -12,4 +12,4 @@ codepy>=2019.1
 click<9.0
 multidict
 anytree>=2.4.3,<=2.8
-distributed<2023.5
+distributed<2023.6