Update app.py

Decreased best match ratio for text highlights

app.py

@@ -43,7 +43,7 @@ def find_best_match(needle, haystack):
     
     # Find the best match that exceeds our threshold
     best_match = None
-    best_match_ratio = 0.9  # Initialize the best match ratio with our minimum threshold
+    best_match_ratio = 0.5  # Initialize the best match ratio with our minimum threshold
     
     for match in matches:
         i, j, n = match