Added smart quotes.

src/docs/asciidoc/sdk/xcode_project.adoc

@@ -55,7 +55,7 @@ image::sdk/xcode_add_placeholder.jpg[xcode_add_placeholder.jpg]
 +
 image::sdk/xcode_add_account.jpg[xcode_add_account.jpg]
 
-. Now click the PROJECT menu and BUILD again and it should compile now but fails at the linking stage.
+. Now click the "`PROJECT`" menu and "`BUILD`" again and it should compile now but fails at the linking stage.
 +
 image::sdk/xcode_build.jpg[xcode_build.jpg]