fix: use site_name as alt for logo (#79)

Signed-off-by: squidfunk <martin.donath@squidfunk.com>

Author: squidfunk

dist/partials/logo.html

@@ -2,7 +2,7 @@
   This file was automatically generated - do not edit
 -#}
 {% if config.theme.logo %}
-  <img src="{{ config.theme.logo | url }}" alt="logo">
+  <img src="{{ config.theme.logo | url }}" alt="{{ config.site_name }}">
 {% else %}
   {% set icon = config.theme.icon.logo or "material/library" %}
   {% include ".icons/" ~ icon ~ ".svg" %}

src/partials/logo.html

@@ -25,7 +25,7 @@
 
 <!-- Logo -->
 {% if config.theme.logo %}
-  <img src="{{ config.theme.logo | url }}" alt="logo" />
+  <img src="{{ config.theme.logo | url }}" alt="{{ config.site_name }}" />
 {% else %}
   {% set icon = config.theme.icon.logo or "material/library" %}
   {% include ".icons/" ~ icon ~ ".svg" %}