Update richtext.md (#224)

update richtext
diff --git a/source/references/components/richtext.md b/source/references/components/richtext.md
index 5b67f88..ef73cf3 100644
--- a/source/references/components/richtext.md
+++ b/source/references/components/richtext.md
@@ -79,4 +79,4 @@
 
 ## Example
 
-[richtext 示例](http://dotwe.org/vue/f60fa4323e8248c91ed88d53af2ce9fc)
\ No newline at end of file
+[richtext example](http://dotwe.org/vue/f60fa4323e8248c91ed88d53af2ce9fc)