Fix jade syntax in vue files

The pug package isn't ready yet so you still need to use the jade
package for vue files. We can still apply the pug syntax to the regions

syntax/vue.vim

@@ -37,6 +37,7 @@ if s:syntaxes.pug
   syntax include @PUG syntax/pug.vim
   unlet b:current_syntax
   syntax region pug keepend start=/<template lang="[^"]*pug[^"]*">/ end="</template>" contains=@PUG fold
+  syntax region pug keepend start=/<template lang="[^"]*jade[^"]*">/ end="</template>" contains=@PUG fold
 endif
 
 syntax include @JS syntax/javascript.vim