fixed grammar for 32bit

docs/development/build-instructions-osx.md

@@ -49,7 +49,7 @@ After building is done, you can find `Electron.app` under `out/D`.
 ## 32bit Support
 
 Electron can only be built for a 64bit target on macOS and there is no plan to
-support 32bit macOS in future.
+support 32bit macOS in the future.
 
 ## Tests