SIENTIAPDE-1646

SIENTIAPDE-1646 Add new runtime configuration for single environment in values.yaml

- Introduced a new runtime named "single" with a replica count of 1.
- Added an environment variable "GITHUB_BRANCH" set to "0.4.2" for the new runtime.

values.yaml

@@ -233,6 +233,11 @@ global:
 runtimes:
   - name: "basic"
     replicas: 1
+  - name: "single"
+    replicas: 1
+    env:
+      - name: "GITHUB_BRANCH"
+        value: "0.4.2"
 
 # -----------------------------------------------------------------------------
 # Chart-level configuration (applies to all runtimes)