README: Mention Alpha and HPPA (#2357)

README.md

@@ -15,9 +15,9 @@ disasm engine for binary analysis and reversing in the security community.
 Created by Nguyen Anh Quynh, then developed and maintained by a small community,
 Capstone offers some unparalleled features:
 
-- Support multiple hardware architectures: ARM, AArch64, BPF, Ethereum VM,
-  M68K, M680X, Mips, MOS65XX, PPC, RISC-V(rv32G/rv64G), SH, Sparc, SystemZ,
-  TMS320C64X, TriCore, Webassembly, XCore and X86 (16, 32, 64).
+- Support multiple hardware architectures: ARM, AArch64, Alpha, BPF, Ethereum VM,
+  HP PA-RISC (HPPA), M68K, M680X, Mips, MOS65XX, PPC, RISC-V(rv32G/rv64G), SH, Sparc,
+  SystemZ, TMS320C64X, TriCore, Webassembly, XCore and X86 (16, 32, 64).
 
 - Having clean/simple/lightweight/intuitive architecture-neutral API.