Update README.md

Add Pin button customization documentation

Author: jeremiahAI

README.md

@@ -183,11 +183,12 @@ First specify the theme in your `styles.xml` file. In this theme, you can edit t
         <item name="colorPrimary">@color/colorPrimary</item>
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="colorAccent">@color/colorAccent</item>
-        <item name="OTPButtonStyle">@style/otpBtnStyle2</item>
-        <item name="PayButtonStyle">@style/payBtnStyle2</item>
-        <item name="OTPHeaderStyle">@style/otpHeaderStyle2</item>
-        <item name="TabLayoutStyle">@style/tabLayoutStyle2</item>
-        <item name="PinHeaderStyle">@style/pinHeaderStyle2</item>
+        <item name="OTPButtonStyle">@style/myOtpBtnStyle</item>
+        <item name="PayButtonStyle">@style/myBtnStyle</item>
+	<item name="PinButtonStyle">@style/myPinButtonStyle</item>
+        <item name="OTPHeaderStyle">@style/myOtpHeaderStyle</item>
+        <item name="TabLayoutStyle">@style/myTabLayoutStyle</item>
+        <item name="PinHeaderStyle">@style/myPinHeaderStyle</item>
         <item name="PaymentTileStyle">@style/myPaymentTileStyle</item>
         <item name="PaymentTileTextStyle">@style/myPaymentTileTextStyle</item>
         <item name="PaymentTileDividerStyle">@style/myPaymentTileDividerStyle</item>