fix data attribute name to make responsive iframes work

rocket-lazy-load.php

@@ -3,7 +3,7 @@
  * Plugin Name: Lazy Load by WP Rocket
  * Plugin URI: http://wordpress.org/plugins/rocket-lazy-load/
  * Description: The tiny Lazy Load script for WordPress without jQuery or others libraries.
- * Version: 1.4.4
+ * Version: 1.4.5
  * Author: WP Media
  * Author URI: https://wp-rocket.me
  * Text Domain: rocket-lazy-load
@@ -505,7 +505,7 @@ function rocket_lazyload_iframes( $html ) {
 			 *
 			 * @param array $html Output that will be printed.
 			 */
-			$iframe_lazyload = apply_filters( 'rocket_lazyload_iframe_html', str_replace( $iframe[1], $placeholder . '" data-fitvidscompatible="1" data-lazy-src="' . $iframe[1], $iframe[0] ) );
+			$iframe_lazyload = apply_filters( 'rocket_lazyload_iframe_html', str_replace( $iframe[1], $placeholder . '" data-rocket-lazyload="fitvidscompatible" data-lazy-src="' . $iframe[1], $iframe[0] ) );
 			$iframe_lazyload .= $iframe_noscript;
 
 			$html = str_replace( $iframe[0], $iframe_lazyload, $html );