Fix avatar misalignment (#22955)

Fix #22818.

|  Before   | After  |
|  ----  | ----  |
| <img
src="https://user-images.githubusercontent.com/15528715/219617504-d86e7a90-d4ac-4a92-bd8a-100dddc693d5.png"
width="200px" /> | <img
src="https://user-images.githubusercontent.com/15528715/219618645-a4045f65-bda6-49ce-a676-f03a9817bb70.png"
width="200px" />|
| <img
src="https://user-images.githubusercontent.com/15528715/219618013-844ef208-853b-44bd-a67c-36e360f0ffa7.png"
width="200px" /> | <img
src="https://user-images.githubusercontent.com/15528715/219618361-cb13c369-852e-47bf-ae30-e429d348823d.png"
width="200px" /> |

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

templates/repo/issue/view_content/pull.tmpl

@@ -13,7 +13,7 @@
 									{{avatar $.Context .User}}
 								</a>
 							{{end}}
-							<span>
+							<span class="gt-ml-2">
 								{{if .User}}
 									<a href="{{.User.HomeLink}}">{{.User.GetDisplayName}}</a>
 								{{else if .Team}}

web_src/less/_explore.less

@@ -69,6 +69,7 @@
 .ui.user.list {
   .item {
     padding-bottom: 25px;
+    display: flex;
 
     &:not(:first-child) {
       border-top: 1px solid var(--color-secondary);
@@ -78,6 +79,7 @@
     img.ui.avatar {
       width: 40px;
       height: 40px;
+      margin-right: 10px;
     }
 
     .description {