update leaflet.css in link meta tag

Author: CollinBeczak

index.html

@@ -24,9 +24,7 @@
     <link rel="icon" type="image/png" sizes="16x16" href="/assets/images/favicons/favicon-16x16.png">
     <link rel="shortcut icon" href="/favicon.ico">
 
-    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.3/dist/leaflet.css"
-          integrity="sha512-07I2e+7D8p6he1SIM+1twR5TIrhUQn9+I6yjqD53JQjFiMf8EtC93ty0/5vJTZGF8aAocvHYNEDJajGdNx1IsQ=="
-          crossorigin=""/>
+    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY=" crossorigin="" />
     <link
       href="https://unpkg.com/mapillary-js@4.1.2/dist/mapillary.css"
       rel="stylesheet"