fix: repo header avatar link

lib/screens/gitlab_project.dart

@@ -74,7 +74,9 @@ class GitlabProjectScreen extends StatelessWidget {
           children: <Widget>[
             RepoHeader(
               avatarUrl: p.avatarUrl,
-              avatarLink: '/${p.namespace.name}',
+              avatarLink: p.namespace.kind == 'group'
+                  ? '/gitlab/group/${p.namespace.id}'
+                  : '/gitlab/user/${p.namespace.id}',
               owner: p.namespace.name,
               name: p.name,
               description: p.description,

lib/widgets/repo_header.dart

@@ -40,7 +40,7 @@ class RepoHeader extends StatelessWidget {
               Avatar(
                 url: avatarUrl,
                 size: AvatarSize.small,
-                linkUrl: '/$owner',
+                linkUrl: avatarLink,
               ),
               SizedBox(width: 8),
               Text(