Fix commit's time (#18375) (#18392)

- Backport of #18375

templates/repo/commits_list.tmpl

@@ -75,7 +75,11 @@
 							<pre class="commit-body" style="display: none;">{{RenderCommitBody .Message $commitRepoLink $.Repository.ComposeMetas}}</pre>
 							{{end}}
 						</td>
-						<td class="text right aligned">{{TimeSince .Author.When $.Lang}}</td>
+						{{if .Committer}}
+							<td class="text right aligned">{{TimeSince .Committer.When $.Lang}}</td>
+						{{else}}
+							<td class="text right aligned">{{TimeSince .Author.When $.Lang}}</td>
+						{{end}}
 					</tr>
 				{{end}}
 			</tbody>

templates/repo/view_list.tmpl

@@ -34,7 +34,7 @@
 					</span>
 				{{end}}
 			</th>
-			<th class="text grey right age">{{if .LatestCommit}}{{if .LatestCommit.Author}}{{TimeSince .LatestCommit.Author.When $.Lang}}{{end}}{{end}}</th>
+			<th class="text grey right age">{{if .LatestCommit}}{{if .LatestCommit.Committer}}{{TimeSince .LatestCommit.Committer.When $.Lang}}{{end}}{{end}}</th>
 		</tr>
 	</thead>
 	<tbody>