API-400: add documentation on the update of a family variant

Author: ahocquard

content/swagger/resources/families/routes/families_code_variants_code.yaml

@@ -23,3 +23,34 @@ get:
       $ref: "#/responses/404Error"
     406:
       $ref: "#/responses/406Error"
+patch:
+  summary: Update/create a family a family variant
+  operationId: "patch_families__family_code__variants__code__"
+  tags:
+    - Families
+  x-versions:
+    - 2.0
+  description: This endpoint allows you to update a given family variant. Know more about <a href="/documentation/update.html#update-behavior">Update behavior</a>. Note that if no family variant exists for the given code, it creates it.
+  parameters:
+    - $ref: '#/parameters/family_code'
+    - $ref: '#/parameters/code'
+    - name: body
+      in: body
+      required: true
+      schema:
+        $ref: "#/definitions/FamilyVariant"
+  responses:
+    201:
+      $ref: "#/responses/Created"
+    204:
+      $ref: "#/responses/NoContent"
+    400:
+      $ref: "#/responses/400Error"
+    401:
+      $ref: "#/responses/401Error"
+    403:
+      $ref: "#/responses/403Error"
+    415:
+      $ref: "#/responses/415Error"
+    422:
+      $ref: "#/responses/422Error"