typo fix [skip ci]

framework/db/QueryInterface.php

@@ -102,7 +102,7 @@ interface QueryInterface
      * - **or**: similar to the `and` operator except that the operands are concatenated using `OR`. For example,
      *   `['or', ['type' => [7, 8, 9]], ['id' => [1, 2, 3]]` will generate `(type IN (7, 8, 9) OR (id IN (1, 2, 3)))`.
      *
-     * - **not**: this will take only one operator and build the negation of it by prefixing the query string with `NOT`.
+     * - **not**: this will take only one operand and build the negation of it by prefixing the query string with `NOT`.
      *   For example `['not', ['attribute' => null]]` will result in the condition `NOT (attribute IS NULL)`.
      *
      * - **between**: operand 1 should be the column name, and operand 2 and 3 should be the