Correct typename.

Refs #8026

src/View/ViewVarsTrait.php

@@ -123,7 +123,7 @@ public function createView($viewClass = null)
      * Saves a variable or an associative array of variables for use inside a template.
      *
      * @param string|array $name A string or an array of data.
-     * @param string|array|null|boolean $value Value in case $name is a string (which then works as the key).
+     * @param string|array|null|bool $value Value in case $name is a string (which then works as the key).
      *   Unused if $name is an associative array, otherwise serves as the values to $name's keys.
      * @return $this
      */