[Bug]: .mhtml file type icon falls back to genericfile instead of using HTML

[alina-zaieva]

Library

React / v8 (@fluentui/react)

System Info

System:
    OS: Windows 10 10.0.22621
    CPU: (8) x64 Intel(R) Core(TM) i7-1065G7 CPU @ 1.30GHz
    Memory: 10.17 GB / 31.60 GB
  Browsers:
    Edge: Spartan (44.22621.1702.0), Chromium (113.0.1774.42), ChromiumDev (115.0.1843.0)
    Internet Explorer: 11.0.22621.1

Are you reporting Accessibility issue?

no

Reproduction

https://codesandbox.io/s/optimistic-meninsky-l2gknx

Bug Description

Actual Behavior

When using File Type icons via getFileTypeIconProps from @fluentui/react-file-type-icons, mhtml files are shown with generic icon which is different from mht files that use HTML icon.

Expected Behavior

Both mht and mhtml extensions are mapped to HTML file type icon.

Logs

No response

Requested priority

Low

Products/sites affected

Enterprise search in SharePoint and office.com

Are you willing to submit a PR to fix?

yes

Validations

• [X] Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• [X] The provided reproduction is a minimal reproducible example of the bug.