Fix markdown wrap (go-gitea#34697)

Fix go-gitea#34696

Author: wxiaoguang

web_src/css/markup/content.css

@@ -2,7 +2,7 @@
   overflow: hidden;
   font-size: 16px;
   line-height: 1.5 !important;
-  overflow-wrap: anywhere;
+  overflow-wrap: break-word;
 }
 
 .markup > *:first-child {

web_src/css/repo/home.css

@@ -62,6 +62,7 @@
 
 .repo-view-content {
   flex: 1;
+  min-width: 0;
 }
 
 .language-stats {