Update usmt-recognized-environment-variables.md

[eccoisle]

Description

The following paths:

C:\Program Files(86)
C:\Program Files(86)\Common

are referenced in explanations for the "CSIDL_PROGRAM_FILESX86" and "CSIDL_PROGRAM_FILES_COMMONX86" environmental variables.

I'm assuming this is an error, since these paths don't exist on a clean install of Windows 11, and placing Program Files(86) between two percent symbols: cd %Program Files(86)% returns The system cannot find the path specified..

Additionally, the explanations for the "PROGRAMFILES(X86)" and "COMMONPROGRAMFILES(X86)" environmental variables reference the correct paths:

C:\Program Files (x86)
C:\Program Files (x86)\Common Files

If this is intentional, I think the page would benefit from having an explanatory footnote or something similar since a cursory Google search doesn't return anything helpful.

Why

I believe that there's an error in the documentation.

Changes

Changed the explanations of "CSIDL_PROGRAM_FILESX86" and "CSIDL_PROGRAM_FILES_COMMONX86" to C:\Program Files (x86) and C:\Program Files (x86)\Common Files, respectively.

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