Describe the effect of !noreturn

Author: tauoverpi

README.md

@@ -801,3 +801,5 @@ Credit: @tauoverpi
 ```zig
 echo "pub fn main() !noreturn { unreachable; }" > vimkill.zig; zig build-exe vimkill.zig
 ```
+
+This eventually [exhausts memory](https://github.com/ziglang/zig/issues/3461) on the machine which gives the OOM killer a chance to kill vim.