Update README.md

Author: arandomdev

README.md

@@ -1,6 +1,6 @@
 [![PyPI version](https://badge.fury.io/py/dyldextractor.svg)](https://badge.fury.io/py/dyldextractor)
 # DyldExtractor
-Extract Binaries from Apple's Dyld Shared Cache to be useful in a disassembler.
+Extract Binaries from Apple's Dyld Shared Cache to be useful in a disassembler. This tool only supports iOS, arm64.
 
 # Installation