Another instance of possible incorrect class comparison

[comay]

Description

While examining a system with Ohai 15.6.3 that was exhibiting the issue called out in #1414, I did a code sweep and noticed there is another instance where the class string is compared against the string "Mash" rather than using is_a?(Mash).

Ohai Version

15.6.3

Platform Version

Ubuntu 20.04.5 LTS

Ohai Output

AFAIK, there is no effect on the output of ohai but I wanted to log this bug report in case this was overlooked.