Fix typo in linear.mdx (#8605)

minumum -> minimum

Author: eltociear

docs/docs/axes/cartesian/linear.mdx

@@ -62,7 +62,7 @@ let options = {
 ## Grace
 
 If the value is string ending with `%`, its treat as percentage. If number, its treat as value.
-The value is added to the maximum data value and subtracted from the minumum data. This extends the scale range as if the data values were that much greater.
+The value is added to the maximum data value and subtracted from the minimum data. This extends the scale range as if the data values were that much greater.
 
 import { useEffect, useRef } from 'react';