Fix production CI deployment namespace

Change prod namespace from orch-prod-namespace to orch-namespace.

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Fixed production CI deployment namespace to use correct `orch-namespace` (#54)
 
 ## [0.5.0] - 2026-01-23
 ### Added