[PM-20288] Automate iOS repo update and improve release-swift process

.github/workflows/build-swift.yml

@@ -132,6 +132,8 @@ jobs:
               ref: 'main',
               inputs: {
                 'build-run-id': '${{ github.run_id }}',
-                'pre-release': 'true'
+                'build-run-number': '${{ github.run_number }}',
+                'sdk-swift-branch-name': 'unstable',
+                'update-ios-repo': 'true',
               }
             })