[readme] A few new updates

README.md

@@ -14,15 +14,18 @@ See https://github.com/littlekernel/lk for the latest version.
 
 ### Supported architectures
 
--   ARM32
--   -  Cortex-M class cores (armv6m - armv8m)
--   -  ARMv7+ Cortex-A class cores
--   ARM64
--   RISC-V 32 and 64bit bit in machine and supervisor mode
--   x86-32 and x86-64 386 up through modern cores
--   microblaze
--   MIPS
--   OpenRISC 1000
+- ARM32
+- - Cortex-M class cores (armv6m - armv8m)
+- - ARMv7+ Cortex-A class cores
+- ARM64
+- - ARMv8 and ARMv9 cores
+- RISC-V 32 and 64bit bit in machine and supervisor mode
+- x86-32 and x86-64 386 up through modern cores
+- Motorola 68000
+- Microblaze
+- MIPS
+- OpenRISC 1000
+- VAX (experimental)
 
 ### [TODO](docs/todo.md)
 
@@ -39,4 +42,4 @@ arm machine 'virt' emulation. type 'help' for commands.
 Note: for ubuntu x86-64:
 sudo apt-get install gcc-arm-none-eabi
 or fetch a prebuilt toolchain from
-https://newos.org/toolchains/x86_64-elf-10.2.0-Linux-x86_64.tar.xz
+https://newos.org/toolchains/x86_64-elf-13.2.0-Linux-x86_64.tar.xz