fix(storagetransfer): update the API

#### storagetransfer:v1
The following keys were changed:
- schemas.Date.description
- schemas.Date.properties.day.description
- schemas.Date.properties.month.description
- schemas.Date.properties.year.description

discovery/storagetransfer-v1.json

@@ -406,7 +406,7 @@
       }
     }
   },
-  "revision": "20201013",
+  "revision": "20201016",
   "rootUrl": "https://storagetransfer.googleapis.com/",
   "schemas": {
     "AwsAccessKey": {
@@ -476,21 +476,21 @@
       "type": "object"
     },
     "Date": {
-      "description": "Represents a whole or partial calendar date, e.g. a birthday. The time of day and time zone are either specified elsewhere or are not significant. The date is relative to the Proleptic Gregorian Calendar. This can represent: * A full date, with non-zero year, month and day values * A month and day value, with a zero year, e.g. an anniversary * A year on its own, with zero month and day values * A year and month value, with a zero day, e.g. a credit card expiration date Related types are google.type.TimeOfDay and `google.protobuf.Timestamp`.",
+      "description": "Represents a whole or partial calendar date, such as a birthday. The time of day and time zone are either specified elsewhere or are insignificant. The date is relative to the Gregorian Calendar. This can represent one of the following: * A full date, with non-zero year, month, and day values * A month and day value, with a zero year, such as an anniversary * A year on its own, with zero month and day values * A year and month value, with a zero day, such as a credit card expiration date Related types are google.type.TimeOfDay and `google.protobuf.Timestamp`.",
       "id": "Date",
       "properties": {
         "day": {
-          "description": "Day of month. Must be from 1 to 31 and valid for the year and month, or 0 if specifying a year by itself or a year and month where the day is not significant.",
+          "description": "Day of a month. Must be from 1 to 31 and valid for the year and month, or 0 to specify a year by itself or a year and month where the day isn't significant.",
           "format": "int32",
           "type": "integer"
         },
         "month": {
-          "description": "Month of year. Must be from 1 to 12, or 0 if specifying a year without a month and day.",
+          "description": "Month of a year. Must be from 1 to 12, or 0 to specify a year without a month and day.",
           "format": "int32",
           "type": "integer"
         },
         "year": {
-          "description": "Year of date. Must be from 1 to 9999, or 0 if specifying a date without a year.",
+          "description": "Year of the date. Must be from 1 to 9999, or 0 to specify a date without a year.",
           "format": "int32",
           "type": "integer"
         }

src/apis/storagetransfer/v1.ts

@@ -190,19 +190,19 @@ export namespace storagetransfer_v1 {
    */
   export interface Schema$CancelOperationRequest {}
   /**
-   * Represents a whole or partial calendar date, e.g. a birthday. The time of day and time zone are either specified elsewhere or are not significant. The date is relative to the Proleptic Gregorian Calendar. This can represent: * A full date, with non-zero year, month and day values * A month and day value, with a zero year, e.g. an anniversary * A year on its own, with zero month and day values * A year and month value, with a zero day, e.g. a credit card expiration date Related types are google.type.TimeOfDay and `google.protobuf.Timestamp`.
+   * Represents a whole or partial calendar date, such as a birthday. The time of day and time zone are either specified elsewhere or are insignificant. The date is relative to the Gregorian Calendar. This can represent one of the following: * A full date, with non-zero year, month, and day values * A month and day value, with a zero year, such as an anniversary * A year on its own, with zero month and day values * A year and month value, with a zero day, such as a credit card expiration date Related types are google.type.TimeOfDay and `google.protobuf.Timestamp`.
    */
   export interface Schema$Date {
     /**
-     * Day of month. Must be from 1 to 31 and valid for the year and month, or 0 if specifying a year by itself or a year and month where the day is not significant.
+     * Day of a month. Must be from 1 to 31 and valid for the year and month, or 0 to specify a year by itself or a year and month where the day isn't significant.
      */
     day?: number | null;
     /**
-     * Month of year. Must be from 1 to 12, or 0 if specifying a year without a month and day.
+     * Month of a year. Must be from 1 to 12, or 0 to specify a year without a month and day.
      */
     month?: number | null;
     /**
-     * Year of date. Must be from 1 to 9999, or 0 if specifying a date without a year.
+     * Year of the date. Must be from 1 to 9999, or 0 to specify a date without a year.
      */
     year?: number | null;
   }