Docs: Add a @global entry for $tinymce_version in _WP_Editors::editor_js().

Props jontyravi.
Fixes #41311.

git-svn-id: https://develop.svn.wordpress.org/trunk@41040 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-editor.php

@@ -1418,6 +1418,7 @@ final class _WP_Editors {
 	 * Print (output) the TinyMCE configuration and initialization scripts.
 	 *
 	 * @static
+	 * @global string $tinymce_version
 	 */
 	public static function editor_js() {
 		global $tinymce_version;