fix spelling of parameter

Change-Id: I6fc2d45a204a0707f7e40a7f426d18ea64f35979
Reviewed-on: https://gerrit.instructure.com/3087
Reviewed-by: Zach Wily <zach@instructure.com>
Tested-by: Hudson <hudson@instructure.com>

Author: jtolio

app/views/plugins/_big_blue_button_settings.html.erb

@@ -18,8 +18,8 @@
       <td><%= f.label :secret, "Secret:" %></td>
       <td>
         <%= f.password_field :secret, :autocomplete => false %><br>
-        This is the <b>beans.dynamicConferenceService.securitySalt</b> paramater that can be found in the <b>bigbluebutton.properties</b> config file.
+        This is the <b>beans.dynamicConferenceService.securitySalt</b> parameter that can be found in the <b>bigbluebutton.properties</b> config file.
       </td>
     </tr>
   </table>
-<% end %>
+<% end %>