use dlang/dub-docs as github link, show in header

Author: WebFreak001

docs/dub-guide/contributing.md

@@ -22,4 +22,4 @@ For more information see [Registries](../dub-reference/registries.md).
 
 The documentation pages you are reading right now are also available on GitHub:
 
-[https://github.com/WebFreak001/dub-docs-v2](https://github.com/WebFreak001/dub-docs-v2)
+[https://github.com/dlang/dub-docs](https://github.com/dlang/dub-docs)

docs/stylesheets/extra.css

@@ -241,9 +241,3 @@ div.install.os-snap {
 div.install.os-openbsd {
     background-image: url(../images/product/openbsd_logo.png);
 }
-
-/* hide table of contents, we use inline header links instead */
-
-.md-header__source {
-    display: none;
-}

mkdocs.yml

@@ -1,6 +1,6 @@
 site_name: DUB Documentation
 
-repo_url: https://github.com/WebFreak001/dub-docs-v2
+repo_url: https://github.com/dlang/dub-docs
 
 theme:
   name: material