Docs: Add a missing @since version to the hook doc for the the_excerpt_embed filter, introduced in [34903].

See #34227.


git-svn-id: https://develop.svn.wordpress.org/trunk@34975 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/embed-functions.php

@@ -776,6 +776,8 @@ function the_excerpt_embed() {
 	/**
 	 * Filter the post excerpt for the embed template.
 	 *
+	 * @since 4.4.0
+	 *
 	 * @param string $output The current post excerpt.
 	 */
 	echo apply_filters( 'the_excerpt_embed', $output );