Update default value label in class-options shortcode for clarity

Author: MrHinsh

docs/layouts/_shortcodes/class-options.html

@@ -69,7 +69,7 @@
 
       <!-- Default Value -->
       <div class="col-12 col-md-1">
-          <div class="d-md-none fw-bold text-muted small">Default Value:</div>
+          <div class="d-md-none fw-bold text-muted small">Default:</div>
           {{ if .defaultValue }}
           <code class="text-success">{{ .defaultValue }}</code>
           {{ else }}