corrected alternative to alternatively

Working-on-Windows.md

@@ -1,6 +1,6 @@
 ## Building Library
 
-To build your raylib game for Windows you need to download raylib git repository. raylib already comes with ready-to-use makefiles and CMake system to compile source code, examples and templates. You can alternative download *raylib Windows Installer*.
+To build your raylib game for Windows you need to download raylib git repository. raylib already comes with ready-to-use makefiles and CMake system to compile source code, examples and templates. You can alternatively download *raylib Windows Installer*.
 
 **raylib Windows Installer** comes with all the required tools to develop with raylib, those tools are:
  * C Compiler (TCC or MinGW) - To compile the code, it includes all required system libraries.