fix(bluetooth-le): Fix typo in interface definition (#2881)

Author: ndrake

src/@ionic-native/plugins/bluetooth-le/index.ts

@@ -339,7 +339,7 @@ export interface InitializeResult {
   /** Service's UUID */
   service: string;
   /** Characteristic UUID */
-  characterisitc: string;
+  characteristic: string;
   /** This integer value will be incremented every read/writeRequested */
   requestId: number;
   /** Offset value */