update mask-icon to a working mask-icon.svg (#10290)

* update mask-icon to favicon.svg

* change name of icon to mask-icon.svg

homeassistant/components/frontend/templates/index.html

@@ -8,7 +8,7 @@
     <link rel='icon' href='/static/icons/favicon.ico'>
     <link rel='apple-touch-icon' sizes='180x180'
           href='/static/icons/favicon-apple-180x180.png'>
-    <link rel="mask-icon" href="/static/icons/home-assistant-icon.svg" color="#3fbbf4">
+    <link rel="mask-icon" href="/static/icons/mask-icon.svg" color="#3fbbf4">
     {% if not dev_mode %}
       <link rel='preload' href='{{ core_url }}' as='script'/>
       {% for panel in panels.values() -%}