Update app.py

app.py

@@ -16,7 +16,7 @@ def count_letter_occurrences(word: str, letter: str) -> int:
     Returns:
         An integer representing the number of occurrences of the letter in the word.
     """
-    return word.count(letter)
+    return word.lower().count(letter.lower())
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: