docs: generate OAS for 2.11.3

Author: shahednasser

www/apps/api-reference/specs/admin/openapi.full.yaml

@@ -94,6 +94,24 @@ delete:
       required: true
       schema:
         type: string
+    - name: fields
+      in: query
+      description: >-
+        Comma-separated fields that should be included in the returned data. If
+        a field is prefixed with `+` it will be added to the default fields,
+        using `-` will remove it from the default fields. Without prefix it will
+        replace the entire default fields.
+      required: false
+      schema:
+        type: string
+        title: fields
+        description: >-
+          Comma-separated fields that should be included in the returned data.
+          If a field is prefixed with `+` it will be added to the default
+          fields, using `-` will remove it from the default fields. Without
+          prefix it will replace the entire default fields.
+        externalDocs:
+          url: '#select-fields-and-relations'
   security:
     - api_token: []
     - cookie_auth: []