templates: strip label of embed dialog

panikweb_templates/templates/soundfiles/dialog-embed.html

@@ -2,7 +2,7 @@
 <div id="dialog-background">
 <div id="dialog-embed">
 <button id="close-button" onclick="$(&quot;#dialog-background&quot;).remove();">x</button>
-        <h2>{% trans 'Embed '%}</h2>
+        <h2>{% trans 'Embed' %}</h2>
 <p>
 Copier/coller le code ci-dessous :
 </p>