py/parsenum: Fix typo in #endif comment.

This fixes a `#endif` comment to exactly match the `#if`.

Signed-off-by: David Lechner <david@pybricks.com>

py/parsenum.c

@@ -214,7 +214,7 @@ static void accept_digit(mp_float_t *p_dec_val, int dig, int *p_exp_extra, int i
         }
     }
 }
-#endif // MICROPY_BUILTINS_FLOAT
+#endif // MICROPY_PY_BUILTINS_FLOAT
 
 #if MICROPY_PY_BUILTINS_COMPLEX
 mp_obj_t mp_parse_num_decimal(const char *str, size_t len, bool allow_imag, bool force_complex, mp_lexer_t *lex)