Fix wrong exception class in no-aws-creds test

Author: alcaeus

tests/SpecTests/ClientSideEncryptionSpecTest.php

@@ -1762,7 +1762,7 @@ public function testOnDemandAwsCredentials(bool $shouldSucceed): void
         ];
 
         if (! $shouldSucceed) {
-            $this->expectException(AuthenticationException::class);
+            $this->expectException(EncryptionException::class);
         }
 
         $dataKeyId = $clientEncryption->createDataKey('aws', $dataKeyOpts);