Update README.md

README.md

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 # Model Card for Floral-High-Dynamic-Range
 
-<img src="./floral-hdr-generation-output-example.png" alt="Floral HDR Grid" width="240" height="240">
+<img src="./floral-hdr-generation-output-example.png" alt="Floral HDR Grid" width="300" height="300">
 
 
 ## Model Details