Fix error code docs

Author: dlarocque

packages/vertexai/src/types/error.ts

@@ -87,7 +87,7 @@ export const enum VertexAIErrorCode {
   /** An error occurred due to a missing Firebase API key. */
   NO_API_KEY = 'no-api-key',
 
-  /** An error occured due to a missing app ID. */
+  /** An error occured due to a missing Firebase app ID. */
   NO_APP_ID = 'no-app-id',
 
   /** An error occurred due to a model name not being specified during initialization. */