Update front matter tags and grammar in two docs

doc/public_access/public_access.md

@@ -5,7 +5,7 @@ type: reference
 # Public access
 
 GitLab allows [Owners](../user/permissions.md) to set a projects' visibility as **public**, **internal**
-or **private**. These visibility levels will affect who will be able to see the project in in the
+or **private**. These visibility levels affect who can see the project in the
 public access directory (`/public` under your GitLab instance), like at [https://gitlab.com/public]().
 
 ## Visibility of projects

doc/tools/email.md

 ---
-type: howto
+type: howto, reference
 ---
 
 # Email from GitLab **[STARTER ONLY]**