Unescaped ampersand in `river/window`

[bandithedoge]

(waybar:203895): Gtk-WARNING **: 09:26:25.466: Failed to set text 'Nerd Fonts - Iconic font aggregator, glyphs/icons collection, & fonts patcher - qutebrowser' from markup due to error parsing markup: Error on line 1: Entity did not end with a semicolon; most likely you used an ampersand character without intending to start an entity — escape ampersand as &