Improve commit record's ui in comment list (#26619)

Before:

![image](https://github.com/go-gitea/gitea/assets/18380374/795f9941-9989-4045-b0fc-d6dd0262269b)

![image](https://github.com/go-gitea/gitea/assets/18380374/f6505f5e-4248-456e-a98d-e714c6484b2f)

After:

![image](https://github.com/go-gitea/gitea/assets/18380374/321dda1e-6999-4851-afff-2e6c8d20367b)

![image](https://github.com/go-gitea/gitea/assets/18380374/182f18d1-2295-4004-852b-c0ebb498b411)

---------

Co-authored-by: silverwind <me@silverwind.io>

web_src/css/repo.css

@@ -1065,11 +1065,7 @@
 
 .repository.view.issue .comment-list .event .detail {
   margin-top: 4px;
-  margin-left: 14px;
-}
-
-.repository.view.issue .comment-list .event .detail .svg {
-  margin-right: 2px;
+  margin-left: 15px;
 }
 
 .repository.view.issue .comment-list .event .segments {