Update minFraud examples to use lastDigits instead of deprecated last4Digits

Replace deprecated last4Digits/Last4Digits with lastDigits/LastDigits:
- C#: Last4Digits → LastDigits
- Java: .last4Digits() → .lastDigits()
- JavaScript: last4digits → lastDigits

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: oschwald

content/minfraud/evaluate-a-transaction.md

@@ -624,7 +624,7 @@ public class MinFraudExample
                 BankPhoneNumber = "555-555-5555",
                 AvsResult = 'Y',
                 CvvResult = 'N',
-                Last4Digits = "1234"
+                LastDigits = "1234"
             },
             Order = new Order
             {
@@ -711,7 +711,7 @@ Transaction request = new Transaction.Builder(
             .bankPhoneNumber("555-555-5555")
             .cvvResult('Y')
             .issuerIdNumber("411111")
-            .last4Digits("1234")
+            .lastDigits("1234")
             .build()
     ).email(
         new Email.Builder()
@@ -855,7 +855,7 @@ try {
       bankPhoneNumber: '555-555-5555',
       cvvResult: 'B',
       issuerIdNumber: '411111',
-      last4digits: '1234',
+      lastDigits: '1234',
       token: 'a_token',
     }),
     order: new minFraud.Order({