fix: 修复子路径下RSS地址错误 (#30)

Author: MyBlueHorizon

layout/partial/social_links.pug

@@ -8,7 +8,7 @@ ul.social-links
             i.fa.fa-envelope
       when "rss"
         li
-          a(href=link)
+          a(url_for(link))
             i.fa.fa-rss
       default
         li