fix(templates): use rel="icon" instead of non-conforming rel="shortcut icon"

Author: Algorithm5838

templates/base.html

@@ -25,7 +25,7 @@
 		<link rel="search" type="application/opensearchdescription+xml" title="Search Redlib" href="/opensearch.xml">
 		<!-- PWA Manifest -->
 		<link rel="manifest" type="application/json" href="/manifest.json">
-		<link rel="shortcut icon" type="image/x-icon" href="/favicon.ico"> 
+		<link rel="icon" type="image/x-icon" href="/favicon.ico">
 		<link rel="stylesheet" type="text/css" href="/style.css?v={{ env!("CARGO_PKG_VERSION") }}">
 		<!-- Video quality -->
 		<div id="video_quality" data-value="{{ prefs.video_quality }}"></div>