Fix OpenRA logo url in readme (OpenRCT2#14535)

readme.md

@@ -217,7 +217,7 @@ We would also like to distribute additional scenarios with the game, when the ti
 
 | [OpenLoco](https://github.com/OpenLoco/OpenLoco) | [OpenTTD](https://github.com/OpenTTD/OpenTTD) | [openage](https://github.com/SFTtech/openage) | [OpenRA](https://github.com/OpenRA/OpenRA) |
 |:------------------------------------------------:|:----------------------------------------------------------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------------:|
-| [![icon_x128](https://user-images.githubusercontent.com/604665/53047651-2c533c00-3493-11e9-911a-1a3540fc1156.png)](https://github.com/OpenLoco/OpenLoco) | [![](https://github.com/OpenTTD/OpenTTD/raw/850d05d24d4768c81d97765204ef2a487dd4972c/media/openttd.128.png)](https://github.com/OpenTTD/OpenTTD) | [![](https://user-images.githubusercontent.com/550290/36507534-4693f354-175a-11e8-93a7-faa0481474fb.png)](https://github.com/SFTtech/openage) | [![](https://raw.githubusercontent.com/OpenRA/OpenRA/bleed/packaging/linux/icons/ra_128x128.png)](https://github.com/OpenRA/OpenRA) |
+| [![icon_x128](https://user-images.githubusercontent.com/604665/53047651-2c533c00-3493-11e9-911a-1a3540fc1156.png)](https://github.com/OpenLoco/OpenLoco) | [![](https://github.com/OpenTTD/OpenTTD/raw/850d05d24d4768c81d97765204ef2a487dd4972c/media/openttd.128.png)](https://github.com/OpenTTD/OpenTTD) | [![](https://user-images.githubusercontent.com/550290/36507534-4693f354-175a-11e8-93a7-faa0481474fb.png)](https://github.com/SFTtech/openage) | [![](https://raw.githubusercontent.com/OpenRA/OpenRA/bleed/packaging/artwork/ra_128x128.png)](https://github.com/OpenRA/OpenRA) |
 | Chris Sawyer's Locomotion | Transport Tycoon Deluxe | Age of Empires 2 | Red Alert |
 
 # 7. Sponsors