add links

Author: Katie Horne

changelog/1.23.0.md

@@ -9,15 +9,16 @@ There are no breaking changes in 1.23.0.
 
 ### Features ✨
 
-- Doctor: Doctor assesses a Kubernetes cluster to determine its readiness for
-  Coder installation; if there are issues, Doctor provides information on why.
+- Doctor: [Doctor](https://github.com/cdr/coder-doctor) assesses a Kubernetes
+  cluster to determine its readiness for Coder installation; if there are
+  issues, Doctor provides information on why.
 - Terraform: Coder has released the first of a series of
   [Terraform scripts](https://github.com/cdr/enterprise-terraform) to facilitate
   one-click Coder deployment.
 
-- web: added support for generic applications; users can provide images with
-  custom applications, instead of only using applications that have been built
-  into the container image `PATH`.
+- web: added support for [generic applications](../workspaces/applications.md);
+  users can provide images with custom applications, instead of only using
+  applications that have been built into the container image `PATH`.
 - web: added support for DataSpell.
 - web: improved input validation for dev URLs.
 - web: added ability to get access token returned by OIDC providers on login.