replace i.e. with e.g. in readme which is more accurate given the context

Author: zahash

README.md

@@ -117,7 +117,7 @@ the GNU build to interop with GNU software built using the MinGW/MSYS2 toolchain
 1. Download the latest [MSYS2 installer][msys2] and go through the installer.
 
 2. Run `mingw32_shell.bat` or `mingw64_shell.bat` from the MSYS2 installation
-   directory (i.e. `C:\msys64`), depending on whether you want 32-bit or 64-bit
+   directory (e.g. `C:\msys64`), depending on whether you want 32-bit or 64-bit
    Rust. (As of the latest version of MSYS2 you have to run `msys2_shell.cmd
    -mingw32` or `msys2_shell.cmd -mingw64` from the command line instead)