[DOCS] Links: Remove emphasis from implem stubs (gatsbyjs#3518)

* [DOCS] Links: Remove emphasis from implem stubs

Some docs have been implemented but are still marked as stubs in the navigation drawer

* Update doc-links.yaml

www/src/pages/docs/doc-links.yaml

@@ -60,9 +60,9 @@
  link: /docs/styled-components/
  - title: Adding Markdown Pages
  link: /docs/adding-markdown-pages/
- - title: Adding a List of Markdown Blog Posts*
+ - title: Adding a List of Markdown Blog Posts
  link: /docs/adding-a-list-of-markdown-blog-posts/
- - title: Adding Tags and Categories to Blog Posts*
+ - title: Adding Tags and Categories to Blog Posts
  link: /docs/adding-tags-and-categories-to-blog-posts/
  - title: Creating Dynamically-Rendered Navigation*
  link: /docs/creating-dynamically-rendered-navigation/