Update README.md

Author: oli414

README.md

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+RCT Graphics Helper is an add-on for Blender 2.79 that aids the creation of sprites that match the graphical style of Rollercoaster Tycoon.
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+![image](https://user-images.githubusercontent.com/2348094/163599017-243ab3a5-5567-4cd2-91d5-565b0cc86e63.png)
 
 # Prerequisites
 
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 # Documentation
 
-[Check out our wiki](https://github.com/oli414/Blender-RCT-Graphics/wiki/Documentation) for more in-depth details on all the available options.
+[Check out our wiki](https://github.com/oli414/Blender-RCT-Graphics/wiki/Documentation) for more in-depth details on all the available options.