[commands] Fix confusion between it's and its

docs/ext/commands/commands.rst

@@ -224,7 +224,7 @@ This works with any callable, such as a function that would convert a string to
 bool
 ^^^^^^
 
-Unlike the other basic converters, the :class:`bool` converter is treated slightly different. Instead of casting directly to the :class:`bool` type, which would result in any non-empty argument returning ``True``, it instead evaluates the argument as ``True`` or ``False`` based on it's given content:
+Unlike the other basic converters, the :class:`bool` converter is treated slightly different. Instead of casting directly to the :class:`bool` type, which would result in any non-empty argument returning ``True``, it instead evaluates the argument as ``True`` or ``False`` based on its given content:
 
 .. code-block:: python3