chore: fix typo

ulivz · ulivz · commit 21f939f16c77 · 2018-05-12T05:04:48.000+08:00
diff --git a/lib/default-theme/styles/code.styl b/lib/default-theme/styles/code.styl
@@ -90,4 +90,4 @@ div[class="language-bash"]:before
   content "sh"
 
 div[class="language-yaml"]:before
-  content "sh"
+  content "yaml"
