Update README.md

Author: dm-zharov

README.md

@@ -19,7 +19,7 @@ How does SwiftSecurity differ from other wrappers?
 
 #### Requirements
 
-* iOS 14.0+ / macCatalyst 14.0+ / macOS 11.0+ / watchOS 7.0+ / tvOS 14.0+ / visionOS 1.0+
+* iOS 14.0+ / macOS 11.0+ / Mac Catalyst 14.0+ / watchOS 7.0+ / tvOS 14.0+ / visionOS 1.0+
 * Swift 5.9
 
 #### Swift Package Manager