Update docs/data/data-grid/filtering/customization.md

Co-authored-by: Andrew Cherniavskii <[email protected]>
Signed-off-by: Rom Grk <[email protected]>

docs/data/data-grid/filtering/customization.md

@@ -186,8 +186,8 @@ There is a new set of APIs with a more efficient interface that are going to be
 You can use them right now to make your custom filters faster. Instead of receiving a `GridCellParams` argument, they receive the parameters listed below.
 
 ```ts
-const colDef = {
- /* ...other column props */
+const operator: GridFilterOperator = {
+ /* ...other operator properties */
  getApplyFilterFnV7: (filterItem: GridFilterItem) => {
  /* This example is our default string filter function for V7 */