Updated README to reflect cover art naming change

README.md

@@ -66,7 +66,7 @@ This method is intended to be used when .fw support isn't available (when portin
 Game covers should be placed in the `romart` folder at the base of your sd card. You can obtain a pre-made pack [here](https://github.com/ducalex/retro-go-covers). Retro-Go is also compatible with the older Go-Play romart pack.
 
 You can add missing cover art by creating a PNG image (160x168, 8bit). Two naming schemes are supported:
-- Filename-based: `/romart/nes/Super Mario.nes.png` (notice the rom extension is included)
+- Filename-based: `/romart/nes/Super Mario.png` (notice the rom extension is *not* included)
 - CRC32-based: `/romart/nes/A/ABCDE123.png` where `nes` is the same as the rom folder, and `ABCDE123` is the CRC32 of the game (press A -> Properties in the launcher to find it), and `A` is the first character of the CRC32
 
 _Note: CRC32-based, which is what is used in the pre-made pack, is much slower than name-based! This type is useful because filenames vary greatly despite having identical CRCs, but if you generate your own art I suggest you use filename-based format and delete all CRC-based art from your SD Card to improve responsiveness._