Update CHANGELOG.md

MTOM support notes

Author: pcai

CHANGELOG.md

@@ -17,6 +17,9 @@
     decrypt the key and pass it to faraday in code
   * Deprecates providing a ca cert, upgrade path is to provide a ca cert file
   * deprecates overriding ssl ciphers, as faraday does not support this
+* MTOM attachment support by @ekzobrain in https://github.com/savonrb/savon/pull/1012
+* Fix: request logging when message contains non-ascii characters
+* Fix: when xml option is provided, attachments option was ignored
 
 ## 2.15.1 (2024-07-08)