Update README.md

README.md

@@ -169,7 +169,7 @@ To access generalizability of GUI subtask execution as a model capability, we co
 
 ### Image Input Size
 
-To maintain optimal model performance, each input image should be set at **1280 (pixal width) \\(\times\\) 720 (pixal height)**.
+To maintain optimal model performance, each input image should be set at **1280 (pixel width) \\(\times\\) 720 (pixel height)**.
 
 
 ### Setup