Fixed broken links

doc/development/documentation/index.md

@@ -173,7 +173,7 @@ There are two types of redirects:
 - Redirect files added into the docs themselves, for users who view the docs in `/help`
   on self-managed instances. For example, [`/help` on GitLab.com](https://gitlab.com/help).
 - Redirects in a [`_redirects`](../../user/project/pages/redirects.md) file, for users
-  who view the docs on <http://docs.gitlab.com>.
+  who view the docs on <https://docs.gitlab.com>.
 
 To add a redirect:
 

doc/development/documentation/styleguide/index.md

@@ -332,7 +332,7 @@ GitLab documentation should be clear and easy to understand.
 ### Trademark
 
 Only use the GitLab name and trademarks in accordance with
-[GitLab Brand Guidelines](https://about.gitlab.com/handbook/marketing/inbound-marketing/digital-experience/brand-guidelines/#trademark).
+[GitLab Brand Guidelines](https://about.gitlab.com/handbook/marketing/corporate-marketing/brand-activation/brand-guidelines/#trademark).
 
 Don't use the possessive form of the word GitLab (`GitLab's`).