docs/website: use lore for ml search

the nabble.com link is dead and lore has a good search.
So use lore for the search form.

Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

docs/website/support.html

@@ -59,11 +59,8 @@
 		    list, since there is a good chance someone else has asked the same question
 		    before.</p>
 
-		  <form method="get" action="http://buildroot-busybox.2317881.n4.nabble.com/template/NamlServlet.jtp">
-		    <input type="text" name="query">
-		    <input type="hidden" name="macro" value="search_page">
-		    <input type="hidden" name="node" value="2">
-		    <input type="hidden" name="sort" value="date">
+		  <form method="get" action="https://lore.kernel.org/buildroot/">
+		    <input type="text" name="q">
 		    <button type="submit" class="btn btn-default">Submit</button>
 		  </form>
 		</div>