chore: bump dev version (#559)

## Description
Bum dev version to 0.5.dev0

## Issue linked


## Checklist
- [x] I have tested my changes locally.
- [x] I have added necessary documentation or updated existing
documentation.
- [x] I have followed the coding style guidelines of this project.
- [x] I have added appropriate tests (unit, integration, system).
- [x] I have reviewed my changes before submitting this pull request.
- [x] I have linked the issue or issues that are solved by the PR if
any.
- [x] I have assigned this PR to myself.
- [x] I have made sure that the title of my PR follows [Conventional
commits style](https://www.conventionalcommits.org/en/v1.0.0/#summary)
(e.g. ``feat: add optical property``)
- [x] I have agreed with the Contributor License Agreement
([CLA](https://developer.ansys.com/form/cla-acceptance)).

Author: StefanThoene

doc/changelog.d/559.maintenance.md

@@ -0,0 +1 @@
+bump dev version

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "flit_core.buildapi"
 
 [project]
 name = "ansys-speos-core"
-version = "0.4.dev0"
+version = "0.5.dev0"
 description = "A Python wrapper for Ansys Speos"
 readme = "README.rst"
 requires-python = ">=3.10"