Make submodule link work with relative path (#35034) (#35038)

Backport #35034 by wxiaoguang

Fix #35033

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/css/repo/home-file-list.css

@@ -71,7 +71,7 @@
 
 #repo-files-table .repo-file-cell.name .entry-name {
   flex-shrink: 1;
-  min-width: 3em;
+  min-width: 1ch; /* leave about one letter space when shrinking, need to fine tune the "shrinks" in this grid in the future */
 }
 
 @media (max-width: 767.98px) {