Docs: Fix typos in some DocBlocks.

Props kebbet.
See #54729.

git-svn-id: https://develop.svn.wordpress.org/trunk@52597 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-theme-json.php

@@ -1520,7 +1520,7 @@ class WP_Theme_JSON {
 		 * Additionally, for some preset types, we also want to make sure the
 		 * values they introduce don't conflict with default values. We do so
 		 * by checking the incoming slugs for theme presets and compare them
-		 * with the equivalent dfefault presets: if a slug is present as a default
+		 * with the equivalent default presets: if a slug is present as a default
 		 * we remove it from the theme presets.
 		 */
 		$nodes        = self::get_setting_nodes( $incoming_data );