Docs: Add missing `@throws` tag to `_wp_json_sanity_check()` DocBlock.

Props subrataemfluence.
See #45643.

git-svn-id: https://develop.svn.wordpress.org/trunk@47427 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/functions.php

@@ -3899,6 +3899,8 @@ function wp_json_encode( $data, $options = 0, $depth = 512 ) {
  *
  * @see wp_json_encode()
  *
+ * @throws Exception If depth limit is reached.
+ *
  * @param mixed $data  Variable (usually an array or object) to encode as JSON.
  * @param int   $depth Maximum depth to walk through $data. Must be greater than 0.
  * @return mixed The sanitized data that shall be encoded to JSON.