Use int() cast instead of is_integer() for renumbered_val

fastanime/core/utils/formatter.py

@@ -244,7 +244,7 @@ def renumber_titles(titles: List[str]) -> Dict[str, Union[int, float, None]]:
             renumbered_val = round(base_val + offset, 3)
 
         renumbered[title] = (
-            int(renumbered_val) if renumbered_val.is_integer() else renumbered_val
+            int(renumbered_val) if int(renumbered_val) else renumbered_val
         )
 
     # Add back the unnumbered titles with `None`