Update app.py

app.py

@@ -172,6 +172,8 @@ def generate(logo=None, Vtubername=""):
   def resize_caption_to_logo(logo, caption):
       logo_width = logo.width
       target_caption_width = int(logo_width)
+      logo_height = logo.height
+      target_caption_width = int(logo_height)
 
       if caption.width > target_caption_width:
           aspect_ratio = caption.height / caption.width