Fix 'Who we are' -> 'About us'

- CMS collection
- a couple of links

src/admin/config.yml

@@ -39,10 +39,10 @@ collections:
           - { label: Body, name: body, widget: markdown, required: true }
 
   - <<: *collection_defaults
-    name: who-we-are
-    label: Who we are
-    label_singular: Who we are page
-    folder: src/who-we-are
+    name: about-us
+    label: About us
+    label_singular: About us page
+    folder: src/about-us
 
   - <<: *collection_defaults
     name: work-we-do

src/contributing/managing-the-playbook.md

@@ -83,7 +83,7 @@ The owner is responsible for making sure that their parts of the Playbook:
 
 The owners of each section are:
 
-* David Mann - [Who we are](/who-we-are/)
+* David Mann - [About us](/about-us/)
 * Alex Jackson - [The work we do > Sales](/work-we-do/sales/)
 * Clare Young - [The work we do > Building services](/work-we-do/building-services/)
 * Alex Jackson -
@@ -168,4 +168,4 @@ This section covers how we hire people and programmes like returners.
 ### Our professions
 
 This section contains principles, practices and specific guidance for each of
-our professions.
+our professions.

src/user-research/index.md

@@ -3,7 +3,7 @@ title: User research at dxw
 related_order: 1000
 last_reviewed_at: ""
 ---
-At dxw, we believe in [starting with people and their needs](https://playbook.dxw.com/who-we-are/#start-with-people-and-their-needs).
+At dxw, we believe in [starting with people and their needs](/about-us/our-mission-values-and-principles/#start-with-people-and-their-needs).
 
 As user researchers, we help multidisciplinary teams learn about all the different people who will use and be affected by a service. And help organisations to recognise the value of user research.