Update README.md

Author: neablis-7

src/main/resources/stsjorbsmodResources/images/cards/README.md

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 In order to make art for each card, read this guide. The list of card images needed can be found in the [Mod Character Package spreadsheet](https://docs.google.com/spreadsheets/d/1GY0eJsooEp361hWFL2lD-uPVa5-l-7g4f4FtyKs-k7Q/edit#gid=0) and in the readme for each card catagory.
 
 Every card needs two images. I am going to use as an example the card "Fresh Adventure". 
-1. A 250px x 190px .png image that serves as the normal card background named "freshadventure.png"
-2. A 500px x 380px .png image that is used when the card is highlighted/zoomed in, named "freshadventure_p.png". The _p stands for portriat. 
+1. A 250px x 190px .png image that serves as the normal card background named "fresh_adventure.png"
+2. A 500px x 380px .png image that is used when the card is highlighted/zoomed in, named "fresh_adventure_p.png". The _p stands for portriat. 
 
 These images need to have a specific shape depending on if they are a skill, power or attack. Luckily, there is a tool that cuts the images for you from a 380 x 500 px template and can be found [here](https://docs.google.com/spreadsheets/d/1GY0eJsooEp361hWFL2lD-uPVa5-l-7g4f4FtyKs-k7Q/edit?usp=sharing)