Update app.py

app.py

@@ -116,7 +116,7 @@ def dl_counts(valforkey):
         sbs96_all_bytes = txt_file.read()
         txt_file.close()    
     with open("sbs1536.txt","rb") as txt_file:
-        sbs96_all_bytes = txt_file.read() 
+        sbs1536_all_bytes = txt_file.read() 
         txt_file.close()
     return sbs96_all_bytes, sbs1536_all_bytes