Provide a hint about how to install x64 version instead of default x86 using vcpkg

Working-on-Windows.md

@@ -18,6 +18,10 @@ You can download and install raylib using the [vcpkg](https://github.com/Microso
       vcpkg integrate install
       vcpkg install raylib
 
+The default triplet in vcpkg is set to "x86-windows". If you want to install x64 version instead, you should use following command:
+
+      vcpkg install raylib:x64-windows
+
 *The raylib port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository.*
 
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