more README clarity

Author: mikdusan

README.md

@@ -1,16 +1,17 @@
 # qemu-static
 
-The purpose of this project is to build a highly compatible QEMU binary package
-for linux to use with Zig testing.
+The purpose of this project is to build a highly compatible linux QEMU binary
+package for Zig CI testing.
 
-Zig needs a very recent QEMU version, sometimes unreleased commit-revs, and
+Zig requires a very recent QEMU version, sometimes unreleased commit-revs, and
 sometimes with custom patches. For this reason, distro-based QEMU packages are
 unsuitable.
 
 The overall strategy is to use Alpine Linux to host a QEMU build and link
 statically to all possible libraries.
 
 It is a non-goal to build QEMU with all features enabled.
+It is a non-goal to build QEMU with system emulation enabled.
 It is a non-goal to build older versions of QEMU.
 
 ## build docker image