AVR: mention new architecture into README.md.

Signed-off-by: Glenn Baker <[email protected]>

Author: glennsec

README.md

@@ -13,7 +13,7 @@ Unicorn is a lightweight, multi-platform, multi-architecture CPU emulator framew
 
 Unicorn offers some unparalleled features:
 
-- Multi-architecture: ARM, ARM64 (ARMv8), M68K, MIPS, PowerPC, RISCV, SPARC, S390X, TriCore and X86 (16, 32, 64-bit)
+- Multi-architecture: ARM, ARM64 (ARMv8), AVR, M68K, MIPS, PowerPC, RISCV, SPARC, S390X, TriCore and X86 (16, 32, 64-bit)
 - Clean/simple/lightweight/intuitive architecture-neutral API
 - Implemented in pure C language, with bindings for Crystal, Clojure, Visual Basic, Perl, Rust, Ruby, Python, Java, .NET, Go, Delphi/Free Pascal, Haskell, Pharo, Lua and Zig.
 - Native support for Windows & *nix (with Mac OSX, Linux, Android, *BSD & Solaris confirmed)