Update README.md

Author: jackbrookes

README.md

@@ -51,7 +51,7 @@ UXF automates the process of collecting data.
 
 Data is stored in CSV files with automatic handling of file & directory naming.
 
-UXF also stores other data in the form of .json files (full details on the [Uncyclo](https://github.com/jackbrookes/unity-experiment-framework/wiki).
+UXF also stores other data in the form of `.json` files (full details on the [Uncyclo](https://github.com/jackbrookes/unity-experiment-framework/wiki))
 
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