Fix context options in `markdown` helper

We need to send `path`, not `requested_path`.

app/helpers/gitlab_markdown_helper.rb

@@ -49,10 +49,10 @@ module GitlabMarkdownHelper
   def markdown(text, context = {})
     context.merge!(
       current_user: current_user,
+      path:         @path,
       project:      @project,
       project_wiki: @project_wiki,
       ref:          @ref,
-      requested_path: @path
     )
 
     Gitlab::Markdown.render(text, context)