CCM-11938: Fixing manual workflow

Author: sidnhs

.github/workflows/manual-proxy-environment-deploy.yaml

@@ -14,7 +14,7 @@ on:
           - int
           - prod
       build_sandbox:
-        description: Whether to build the sandbox container
+        description: Build sandbox container?
         required: false
         default: false
         type: boolean

.github/workflows/stage-3-build.yaml

@@ -107,7 +107,7 @@ jobs:
           apimEnv: "internal-dev-sandbox"
           runId: "${{ github.run_id }}"
           buildSandbox: true
-          releaseVersion: ${{ github.ref_name }}
+          releaseVersion: ${{ github.head_ref != '' && github.head_ref || github.ref_name }}
 
   # artefact-1:
   #   name: "Artefact 1"