Docs: Fix broken markdown with unescaped character (#3470)

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -24,7 +24,7 @@ typically be found at `/etc/gitea/conf/app.ini`.
 
 The defaults provided here are best-effort (not built automatically). They are
 accurately recorded in [app.ini.sample](https://github.com/go-gitea/gitea/blob/master/custom/conf/app.ini.sample)
-(s/master/<tag|release\>). Any string in the format `%(X)s` is a feature powered
+(s/master/\<tag|release\>). Any string in the format `%(X)s` is a feature powered
 by [ini](https://github.com/go-ini/ini/#recursive-values), for reading values recursively.
 
 Values containing `#` or `;` must be quoted using `` ` `` or `"""`.