Fixes a jsdoc/require-description-complete-sentence warning

react/features/base/dialog/components/StatelessDialog.web.js

      * Handles 'Enter' key in the dialog to submit/hide dialog depending on
      * the available buttons and their disabled state.
      *
-     * @param {Object} event - the key event.
+     * @param {Object} event - The key event.
      * @private
      * @returns {void}
      */