chore(docs): Updated API Reference (automated) (#12461)

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/AdminCreateTaxRegion.yaml

@@ -54,3 +54,9 @@ properties:
   metadata:
     type: object
     description: The tax region's metadata, used to store custom key-value pairs.
+  provider_id:
+    type: string
+    title: provider_id
+    description: >-
+      The ID of the tax provider used to calculate the tax rate in this tax
+      region.