[Filtered] Fix call to undefined method WikiPage::factory

[JeroenDeDauw]

Seen on MediaWiki 1.43

Call to undefined method WikiPage::factory()

Source:

SemanticResultFormats/formats/filtered/src/View/MapView.php

Line 308 in ca6b858

$file = \WikiPage::factory( \Title::newFromText( $icon, NS_FILE ) )->getFile();