Docs: Correct the type of the $found parameter in wp_cache_get().

Follow-up to [20089], [34225], [34227], [36069].

Props jigar-bhanushali.
Fixes #63217.

git-svn-id: https://develop.svn.wordpress.org/trunk@60130 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/cache.php

@@ -144,7 +144,7 @@ function wp_cache_set_multiple( array $data, $group = '', $expire = 0 ) {
  * @param string     $group Optional. Where the cache contents are grouped. Default empty.
  * @param bool       $force Optional. Whether to force an update of the local cache
  *                          from the persistent cache. Default false.
- * @param bool       $found Optional. Whether the key was found in the cache (passed by reference).
+ * @param bool|null  $found Optional. Whether the key was found in the cache (passed by reference).
  *                          Disambiguates a return of false, a storable value. Default null.
  * @return mixed|false The cache contents on success, false on failure to retrieve contents.
  */

src/wp-includes/class-wp-object-cache.php

@@ -355,7 +355,7 @@ public function set_multiple( array $data, $group = '', $expire = 0 ) {
 	 * @param string     $group Optional. Where the cache contents are grouped. Default 'default'.
 	 * @param bool       $force Optional. Unused. Whether to force an update of the local cache
 	 *                          from the persistent cache. Default false.
-	 * @param bool       $found Optional. Whether the key was found in the cache (passed by reference).
+	 * @param bool|null  $found Optional. Whether the key was found in the cache (passed by reference).
 	 *                          Disambiguates a return of false, a storable value. Default null.
 	 * @return mixed|false The cache contents on success, false on failure to retrieve contents.
 	 */