Added img tag blurb and link to announcements page

ownchatbot/templates/mgmt.html

@@ -361,7 +361,7 @@
                         <td>
                             <textarea name="announcements" rows="5" cols="50">{{ announcements | join('\n') }}</textarea>
                         </td>
-                        <td>Enter your announcements, one per line.</td>
+                        <td>Enter your announcements, one per line. May contain html <a href=https://www.w3schools.com/tags/tag_img.asp>IMG tags</a> to display images.</td>
                     </tr>
                 </table>
                 <br><button class="button button2" type="submit">Save Changes</button><br>