DEV: bump version to v0.9.0.dev0

Author: lucascolley

RELEASING.md

@@ -1,8 +1,8 @@
 1. Update the version in `src/array_api_extra/__init__.py`
-2. Update the lockfile with `pixi update && pixi install`
+2. Update the lockfile with `pixi update; pixi install`
 3. Push your changes
 4. Cut a release via the GitHub GUI
 5. Update the version to `{next micro version}.dev0`
-6. `pixi clean cache --pypi && pixi update && pixi install`
+6. `pixi clean cache --pypi; pixi update; pixi install`
 7. Push your changes
 8. Merge the automated PR to conda-forge/array-api-extra-feedstock