docs(readme): remove alpha status badge (#3723)

Signed-off-by: Drew Newberry <anewberry@nvidia.com>

Author: drew

README.md

@@ -12,7 +12,6 @@
 [![PyPI](https://img.shields.io/badge/PyPI-openshell-orange?logo=pypi)](https://pypi.org/project/openshell/)
 [![Security Policy](https://img.shields.io/badge/Security-Report%20a%20Vulnerability-red)](SECURITY.md)
 [![Documentation](https://img.shields.io/badge/docs-latest-brightgreen)](https://docs.nvidia.com/openshell/latest/index.html)
-[![Project Status](https://img.shields.io/badge/status-alpha-orange)](https://github.com/NVIDIA/OpenShell/releases)
 
 > [!IMPORTANT]
 > **New in OpenShell 0.1.0:** a stable release cadence, new isolation primitives, an expanded extension surface, and new APIs. [Read the 0.1.0 upgrade guide](https://docs.nvidia.com/openshell/latest/upgrade/0-1-0).