static: fixup missing </form>

Signed-off-by: Sebastien Binet <binet@cern.ch>

static/galene.html

@@ -295,6 +295,7 @@
         <br>
         <button id="invite-cancel" value="cancel" type="button">Cancel</button>
         <button value="invite" value="invite">Invite</button>
+      </form>
     </dialog>
 
     <script src="/protocol.js" defer></script>