Update method descriptions

ballerina/hpke.bal

@@ -26,7 +26,7 @@ public type HybridEncryptionResult record {|
     byte[] cipherText;
 |};
 
-# Returns the ML-KEM-768-HPKE-encrypted value for the given data.
+# Returns the ML-KEM-768-AES-hybrid-encrypted value for the given data.
 # ```ballerina
 # string input = "Hello Ballerina";
 # byte[] data = input.toBytes();
@@ -52,7 +52,7 @@ public isolated function encryptMlKem768Hpke(byte[] input, PublicKey publicKey,
     };
 }
 
-# Returns the ML-KEM-768-HPKE-decrypted value for the given encrypted data.
+# Returns the ML-KEM-768-AES-hybrid-encrypted value for the given encrypted data.
 # ```ballerina
 # string input = "Hello Ballerina";
 # byte[] data = input.toBytes();
@@ -78,7 +78,7 @@ public isolated function decryptMlKem768Hpke(byte[] input, byte[] encapsulatedKe
     return check decryptAesEcb(input, key);
 }
 
-# Returns the RSA-ML-KEM-768-HPKE-encrypted value for the given data.
+# Returns the RSA-KEM-ML-KEM-768-AES-hybrid-encrypted value for the given data.
 # ```ballerina
 # string input = "Hello Ballerina";
 # byte[] data = input.toBytes();
@@ -109,7 +109,7 @@ public isolated function encryptRsaKemMlKem768Hpke(byte[] input, PublicKey rsaPu
     };
 }
 
-# Returns the RSA-ML-KEM-768-HPKE-decrypted value for the given encrypted data.
+# Returns the RSA-KEM-ML-KEM-768-AES-hybrid-encrypted value for the given encrypted data.
 # ```ballerina
 # string input = "Hello Ballerina";
 # byte[] data = input.toBytes();

ballerina/kdf.bal

@@ -17,7 +17,11 @@
 import ballerina/jballerina.java;
 
 # Returns HKDF (HMAC-based Key Derivation Function) using SHA-256 as the hash function.
-#
+# ```ballerina
+# string secret = "some-secret";
+# byte[] key = secret.toBytes();
+# byte[] hash = crypto:hkdfSha256(key, 32);
+# ```
 # + input - The input key material to derive the key from
 # + length - The length of the output keying material (OKM) in bytes
 # + salt - Optional salt value, a non-secret random value