change label to badge for bs4

resource/locales/en-US/sandbox-bootstrap3.md

@@ -1,11 +1,13 @@
 # Labels
 
-<span class="label label-default">Default</span>
-<span class="label label-primary">Primary</span>
-<span class="label label-success">Success</span>
-<span class="label label-info">Info</span>
-<span class="label label-warning">Warning</span>
-<span class="label label-danger">Danger</span>
+<span class="badge badge-primary">Primary</span>
+<span class="badge badge-secondary">Secondary</span>
+<span class="badge badge-success">Success</span>
+<span class="badge badge-info">Info</span>
+<span class="badge badge-warning">Warning</span>
+<span class="badge badge-danger">Danger</span>
+<span class="badge badge-light">Light</span>
+<span class="badge badge-dark">Dark</span>
 
 # Alerts