chore(docs): Updated API Reference (v2) (#9148)

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>

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

@@ -1,5 +1,5 @@
 type: object
-description: SUMMARY
+description: The tax rate's details.
 x-schemaName: AdminCreateTaxRate
 required:
   - name
@@ -9,18 +9,20 @@ properties:
     type: string
     title: name
     description: The tax rate's name.
+    example: VAT
   tax_region_id:
     type: string
     title: tax_region_id
-    description: The tax rate's tax region id.
+    description: The ID of the tax region this rate belongs to.
   rate:
     type: number
     title: rate
-    description: The tax rate's rate.
+    description: The rate to charge.
+    example: 10
   code:
     type: string
     title: code
-    description: The tax rate's code.
+    description: The code the tax rate is identified by.
   rules:
     type: array
     description: The tax rate's rules.
@@ -29,11 +31,14 @@ properties:
   is_default:
     type: boolean
     title: is_default
-    description: The tax rate's is default.
+    description: Whether the tax rate is the default in its tax region.
   is_combinable:
     type: boolean
     title: is_combinable
-    description: The tax rate's is combinable.
+    description: Whether the tax rate should be combined with parent rates.
+    externalDocs:
+      url: >-
+        https://docs.medusajs.com/v2/resources/commerce-modules/tax/tax-rates-and-rules#combinable-tax-rates
   metadata:
     type: object
-    description: The tax rate's metadata.
+    description: The tax rate's metadata, used to store custom key-value pairs.