chore(docs): Updated API Reference (v2) (#9666)

Automated changes by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>
Co-authored-by: Shahed Nasser <27354907+shahednasser@users.noreply.github.com>

www/apps/api-reference/specs/admin/components/schemas/BaseCollection.yaml

@@ -1,3 +1,47 @@
 type: object
-description: The collection's details.
+description: The product collection's details.
 x-schemaName: BaseCollection
+required:
+  - id
+  - title
+  - handle
+  - created_at
+  - updated_at
+  - deleted_at
+  - metadata
+properties:
+  id:
+    type: string
+    title: id
+    description: The collection's ID.
+  title:
+    type: string
+    title: title
+    description: The collection's title.
+  handle:
+    type: string
+    title: handle
+    description: The collection's handle.
+  created_at:
+    type: string
+    format: date-time
+    title: created_at
+    description: The collection's creation date.
+  updated_at:
+    type: string
+    format: date-time
+    title: updated_at
+    description: The collection's update date.
+  deleted_at:
+    type: string
+    format: date-time
+    title: deleted_at
+    description: The collection's deletion date.
+  products:
+    type: array
+    description: The collection's products.
+    items:
+      $ref: ./AdminProduct.yaml
+  metadata:
+    type: object
+    description: The collection's metadata, used to store custom key-value pairs.