INSTALL.md: Fix typo
CLA:trivial
@@ -235,8 +235,7 @@ and issue the following command.
$ nmake install
The easiest way to elevate the Command Prompt is to press and hold down
-the both the `<CTRL>` and `<SHIFT>` key while clicking the menu item in the
-task menu.
+both the `<CTRL>` and `<SHIFT>` keys while clicking the menu item in the task menu.
The default installation location is
