Update GH momo validation instructions

Author: jeremiahAI

raveandroid/src/main/res/values/strings.xml

@@ -40,7 +40,7 @@
         <p>1. Dial <b>*110#</b> to generate your transaction voucher.</p>
         <p>2. Select <b>OPTION 4</b> "Make Payments".</p>
         <p>3. Select <b>OPTION 4</b> to generate the voucher.</p>
-        <p>4. Enter your PIN in next prompt.</p>
+        <p>4. Enter your PIN in the next prompt.</p>
         <p>5. Input the voucher generated in the voucher field below.</p>]]>
     </string>