Yasir,
Unfortunately the article you linked refers to settings in Office XP and Windows 2000. Those options and methods are long gone (Input Locales no longer exists as a setting that way).
An update to all: It turns out this was added in build 1803 (April 2018) update to Windows 10.
The reference is found in Settings - Ease of Access - Speech, on the very bottom (under the checkbox to turn on/off Speech Recognition description).
Unfortunately, it is reference only, no option to disable the shortcut (like there is for the Narrator in Ease of Access).
I hope Microsoft can add a "disable/enable keyboard shortcut" for this setting like they did for Narrator. I still have been able to find no way to disable or change it (such as a registry setting).