Update test expectation

Author: owen-mc

java/ql/test/library-tests/Encryption/insecure.expected

@@ -7,5 +7,5 @@
 | Test.java:15:4:15:8 | "RC4" | It has multiple vulnerabilities, including biases in its output and susceptibility to several attacks. Consider using AES instead. |
 | Test.java:16:4:16:12 | "ARCFOUR" | It has multiple vulnerabilities, including biases in its output and susceptibility to several attacks. Consider using AES instead. |
 | Test.java:17:4:17:8 | "RC5" | It is vulnerable to differential and related-key attacks. Consider using AES instead. |
-| Test.java:18:4:18:22 | "AES/ECB/NoPadding" | Encryption mode ECB like AES/ECB/NoPadding is vulnerable to replay and other attacks. Consider using AES instead. |
-| Test.java:19:4:19:25 | "AES/CBC/PKCS5Padding" | CBC mode of operation with PKCS#5 or PKCS#7 padding is vulnerable to padding oracle attacks. Consider using AES instead. |
+| Test.java:18:4:18:22 | "AES/ECB/NoPadding" | ECB mode, as in AES/ECB/NoPadding for example, is vulnerable to replay and other attacks. Consider using GCM instead. |
+| Test.java:19:4:19:25 | "AES/CBC/PKCS5Padding" | CBC mode with PKCS#5 or PKCS#7 padding is vulnerable to padding oracle attacks. Consider using GCM instead. |