Fail to detect the architecture in an environment of non-US

Fail to detect the architecture in an environment of non-US.

Because the output of the command `wmic` is different depending on the language environment of the OS.

For example, it would look like this in the Japanese environment.

`wmic OS get OSArchitecture`

    OSArchitecture
    32 ビット

Therefore, I changed the regular expression to determine digits only.