fix autocomplete not including exact matches

This was broken by a29eff9.

Author: haarg

lib/MetaCPAN/Query/File.pm

@@ -452,7 +452,10 @@ sub _autocomplete {
 
     return {
         took        => $sugg_res->{took} + $res->{took} + $fav_res->{took},
-        suggestions => \@sorted,
+        suggestions => [
+            $exact,
+            @sorted,
+        ],
     };
 }