Add an exception for Wiki Loves Monuments 2021 in Armenia. (#22)
Since e810058 the expected format is in Armenia_&_Nagorno-Karabakh.
But the category for WLM 2021 is Images_from_Wiki_Loves_Monuments_2021_in_Armenia
Same as aebc1f9 for WLE 2021
See https://phabricator.wikimedia.org/T290234
Pull-request #22
Bug: T290234