Add XHTML as an acceptable file extension to fmt/102 and fmt/103

[sbshep]

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Affected format(s)

fmt/102 fmt/103

Details of change

These are Extensible Hypertext Markup Language files and seem to use the .xhtml extension, but DROID calls out an extension mismatch in favor of .html. Can .xhtml be added as an acceptable extension for these PUIDs?

Credit

The Church of Jesus Christ of Latter-day Saints