MDL-81376: Update PHPDoc string

mod/quiz/classes/overrides_table.php

@@ -263,7 +263,7 @@ public function col_actions($override): string {
      * This function is called for each data row to allow processing of
      * columns which do not have a col_* method.
      *
-     * These contain simple validation and formatting processes.
+     * These contain simple validation and formatting checks.
      *
      * @param string $colname The name of the column.
      * @param stdClass $value The value of the column.