one-character typo change (#2)

docs/index.md

@@ -8,7 +8,7 @@ _Siguza, 01. Dec 2017 (published 31. Dec 2017)_
 
 This is the tale of a macOS-only vulnerability in IOHIDFamily that yields kernel r/w and can be exploited by any unprivileged user.
 
-IOHIDFamily has been notorious in the past for the many race conditions it contained, which ultimately lead to large parts of it being rewritten to make use of command gates, as well as large parts being locked down by means of entitlements. I was originally looking through its source in the hope of finding a low-hanging fruit that would let me compromise an iOS kernel, but what I didn't know then is that some parts of IOHIDFamily exist only on macOS - specifically `IOHIDSystem`, which contains the vulnerability discussed herein.
+IOHIDFamily has been notorious in the past for the many race conditions it contained, which ultimately led to large parts of it being rewritten to make use of command gates, as well as large parts being locked down by means of entitlements. I was originally looking through its source in the hope of finding a low-hanging fruit that would let me compromise an iOS kernel, but what I didn't know then is that some parts of IOHIDFamily exist only on macOS - specifically `IOHIDSystem`, which contains the vulnerability discussed herein.
 
 The exploit accompanying this write-up consists of three parts: