fix(reseller): update the API

#### reseller:v1

The following keys were changed:
- schemas.Seats.properties.numberOfSeats.description

discovery/reseller-v1.json

@@ -631,7 +631,7 @@
       }
     }
   },
-  "revision": "20210720",
+  "revision": "20210904",
   "rootUrl": "https://reseller.googleapis.com/",
   "schemas": {
     "Address": {
@@ -844,7 +844,7 @@
           "type": "integer"
         },
         "numberOfSeats": {
-          "description": "This is a required property and is exclusive to subscriptions with `ANNUAL_MONTHLY_PAY` and `ANNUAL_YEARLY_PAY` plans. This property sets the maximum number of licenses assignable to users on a subscription. The reseller can add more licenses, but once set, the `numberOfSeats` cannot be reduced until renewal. The reseller is invoiced based on the `numberOfSeats` value regardless of how many of these user licenses are assigned. *Note: *G Suite subscriptions automatically assign a license to every user.",
+          "description": "This is a required property and is exclusive to subscriptions with `ANNUAL_MONTHLY_PAY` and `ANNUAL_YEARLY_PAY` plans. This property sets the maximum number of licenses assignable to users on a subscription. The reseller can add more licenses, but once set, the `numberOfSeats` cannot be reduced until renewal. The reseller is invoiced based on the `numberOfSeats` value regardless of how many of these user licenses are assigned. *Note: *Google Workspace subscriptions automatically assign a license to every user.",
           "format": "int32",
           "type": "integer"
         }

src/apis/reseller/v1.ts

@@ -305,7 +305,7 @@ export namespace reseller_v1 {
      */
     maximumNumberOfSeats?: number | null;
     /**
-     * This is a required property and is exclusive to subscriptions with `ANNUAL_MONTHLY_PAY` and `ANNUAL_YEARLY_PAY` plans. This property sets the maximum number of licenses assignable to users on a subscription. The reseller can add more licenses, but once set, the `numberOfSeats` cannot be reduced until renewal. The reseller is invoiced based on the `numberOfSeats` value regardless of how many of these user licenses are assigned. *Note: *G Suite subscriptions automatically assign a license to every user.
+     * This is a required property and is exclusive to subscriptions with `ANNUAL_MONTHLY_PAY` and `ANNUAL_YEARLY_PAY` plans. This property sets the maximum number of licenses assignable to users on a subscription. The reseller can add more licenses, but once set, the `numberOfSeats` cannot be reduced until renewal. The reseller is invoiced based on the `numberOfSeats` value regardless of how many of these user licenses are assigned. *Note: *Google Workspace subscriptions automatically assign a license to every user.
      */
     numberOfSeats?: number | null;
   }