Restore light issue title font weight

Fixes: #24850

Author: silverwind

web_src/css/repo.css

@@ -627,7 +627,7 @@
   align-items: center;
   flex: 1;
   width: 100%;
-  font-weight: var(--font-weight-normal);
+  font-weight: var(--font-weight-light);
   font-size: 32px;
   line-height: 40px;
   margin: 0;