add linebreaks to "Keyboard Maintainer:..." blocks where missing (#3763)

keyboards/phantom/readme.md

@@ -5,8 +5,8 @@ A community-developed keyboard PCB designed to fit inside the case of a Filco Ma
 
 See the [Deskthority wiki](https://deskthority.net/wiki/Phantom) for more information.
 
-Keyboard Maintainer: QMK Community
-Hardware Supported: Phantom PCB
+Keyboard Maintainer: QMK Community  
+Hardware Supported: Phantom PCB  
 Hardware Availability: https://mechanicalkeyboards.com/shop/index.php?l=product_detail&p=536
 
 Make example for this keyboard (after setting up your build environment):