remove extension

src/docs/asciidoc/wiki/wiki_header.adoc

@@ -101,7 +101,7 @@ If you override the variable in the header of the document, that value will be u
 
 Optional. Adding this attribute will allow the use of emoji in the document.
 
-See: <<wiki/emoji.adoc#,Emoji Cheat Sheet>>
+See: <<wiki/emoji#,Emoji Cheat Sheet>>
 
 == ifdef::env-github,env-browser[:outfilesuffix: .adoc]