Fix bug in mask update state

wordle_env/state.py

@@ -74,7 +74,7 @@ def update_from_mask(state: WordleState, word: str, mask: List[int]) -> WordleSt
 
     for i, c in enumerate(word):
         cint = ord(c) - ord(WORDLE_CHARS[0])
-        offset = 1 + len(WORDLE_CHARS) + cint * WORDLE_N * 3
+        offset = 1 + cint * WORDLE_N * 3
         if mask[i] == SOMEWHERE:
             prior_maybe.append(c)
             # Char at position i = no, and in other positions maybe, other chars stay as they are