fix: master -> main

Author: foosel

util/versionselector/_templates/breadcrumbs.html

@@ -26,10 +26,10 @@
 
 <div role="navigation" aria-label="breadcrumbs navigation">
 
-{% if current_version and current_version.name != latest_version.name and current_version.name != "master" %}
+{% if current_version and current_version.name != latest_version.name and current_version.name != "main" %}
   <p style="padding: 10px;margin: 0 0 10px 0;border-radius: 2px;letter-spacing: 1px;font-size: 13px;color: white;text-align: center;background: #3a87ad;background-image: none;background-size: auto;background-size: 28px 28px;background-image: linear-gradient( -45deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.2) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.2) 50%, rgba(255, 255, 255, 0.2) 75%, transparent 75%, transparent );">
     <strong>Note:</strong>
-    These are not the docs of the latest released version. Those can be found <a href="{{ latest_version.url }}" style="color: white;text-decoration: underline">here</a>.
+    These are not the docs of the latest version. Those can be found <a href="{{ latest_version.url }}" style="color: white;text-decoration: underline">here</a>.
   </p>
 {% endif  %}