fix: rename envelope age title

Author: ItsNotGoodName

web/views/index.html

@@ -48,7 +48,7 @@ <h2>Retention Policy</h2>
           {{end}}
           {{if not (eq .RetentionPolicy.EnvelopeAge nil)}}
           <tr>
-            <th scope="row"><strong>Total Envelope Age</strong></th>
+            <th scope="row"><strong>Maximum Envelope Age</strong></th>
             <td>{{.RetentionPolicy.EnvelopeAge}}</td>
           </tr>
           {{end}}