feat: translate name of operator #918 (#1437)

### What problem does this PR solve?

feat: translate name of operator #918

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/flow/categorize-form/dynamic-categorize.tsx

@@ -88,7 +88,7 @@ const DynamicCategorize = ({ nodeId }: IProps) => {
               ))}
 
               <Button type="dashed" onClick={handleAdd} block>
-                + Add Item
+                + {t('addItem')}
               </Button>
             </div>
           );