fix cv2 typo

app.py

@@ -45,7 +45,7 @@ def count_barnacles(raw_input_img, progress=gr.Progress()):
     # crop image
     h, w = raw_input_img.shape[:2]
     imghsv = cv2.cvtColor(raw_input_img, cv2.COLOR_RGB2HSV)
-    hsvblur = cv2.GaussianBlue(imghsv, (9, 9), 0)
+    hsvblur = cv2.GaussianBlur(imghsv, (9, 9), 0)
 
     lower = np.array([70, 20, 20])
     upper = np.array([130, 255, 255])