Add sourceURL comments to style output by reduce_layout_shifts

Author: westonruter

plugins/embed-optimizer/class-embed-optimizer-tag-visitor.php

@@ -202,7 +202,7 @@ private function reduce_layout_shifts( OD_Tag_Visitor_Context $context ): void {
 				$style_rules[] = $style_rule;
 			}
 
-			$processor->append_head_html( sprintf( "<style>\n%s\n</style>\n", join( "\n", $style_rules ) ) );
+			$processor->append_head_html( sprintf( "<style>\n%s\n/*# sourceURL=embed-optimizer-reduce-layout-shifts */\n</style>\n", join( "\n", $style_rules ) ) );
 		}
 	}