update emitter-package.json to add dependency for @typespec/xml (Azure#37771)

* update emitter-package.json

* update emitter-package.json

Author: msyyc

eng/emitter-package-lock.json

@@ -13,6 +13,7 @@
     "@typespec/http": "~0.60.0",
     "@typespec/openapi": "~0.60.0",
     "@typespec/rest": "~0.60.0",
-    "@typespec/versioning": "~0.60.0"
+    "@typespec/versioning": "~0.60.0",
+    "@typespec/xml": "~0.60.0"
   }
 }