Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -39,15 +39,11 @@ or a factual error.
 
 ## Where to Contribute - Needs changes
 
-1.  If you wish to change the template used for workshop websites,
-    please work in <https://github.com/swcarpentry/workshop-template>.
-    The home page of that repository explains how to set up workshop websites,
-    while the extra pages in <https://swcarpentry.github.io/workshop-template>
-    provide more background on our design choices.
-
-2.  If you wish to change CSS style files, tools,
-    or HTML boilerplate for lessons or workshops stored in `_includes` or `_layouts`,
-    please work in <https://github.com/swcarpentry/styles>.
+1.  All documentation content can be found within the `content` folder. Subdirectories indicate menu items,
+    with the top level document called `_index.md` within each subdirectory.
+
+Please do not submit modifications to theme or CSS items, `_header` or `_footer` files unless they 
+adhere to [UNL style guidelines](https://docs.gitlab.com/ee/user/project/issues/managing_issues.html).
 
 ## What to Contribute