Clarify that requires Windows 1803

Versions of WSL earlier than Windows 1803 require glibc.

Author: yuk7

README.md

@@ -1,5 +1,5 @@
 # VoidMuslWSL
-Void Linux on WSL (Windows 10 FCU or later) based on [wsldl](https://github.com/yuk7/wsldl).
+Void Linux on WSL (Windows 10 1803 or later) based on [wsldl](https://github.com/yuk7/wsldl).
 This project is based on Void Linux musl-libc. For GNU-libc, visit https://git.io/voidwsl.
 
 ![screenshot](https://raw.githubusercontent.com/wiki/yuk7/wsldl/img/Arch_Alpine_Ubuntu.png)
@@ -13,7 +13,7 @@ This project is based on Void Linux musl-libc. For GNU-libc, visit https://git.i
 
 
 ## Requirements
-* Windows 10 1709 Fall Creators Update 64bit or later.
+* Windows 10 1803 April 2018 Update x64 or later.
 * Windows Subsystem for Linux feature is enabled.
 
 ## Install