Update _config.yml

Author: KristinaYFischer

docs/_config.yml

@@ -8,7 +8,5 @@ plugins:
 url: "https://nfdi4objects.github.io"
 baseurl: "/n4o_conservation_data_framework"
 
-nav_enabled: true
-search_enabled: true
-back_to_top: true
-back_to_top_text: "Back to top"
+aux_links:
+  Template Repository: https://github.com/just-the-docs/just-the-docs-template