fix(drive): update the API

#### drive:v2
The following keys were changed:
- schemas.File.properties.thumbnailLink.description
- schemas.Revision.properties.publishedLink.description

#### drive:v3
The following keys were changed:
- schemas.File.properties.thumbnailLink.description
- schemas.Revision.properties.publishedLink.description

discovery/drive-v2.json

@@ -38,7 +38,7 @@
   "description": "Manages files in Drive including uploading, downloading, searching, detecting changes, and updating sharing permissions.",
   "discoveryVersion": "v1",
   "documentationLink": "https://developers.google.com/drive/",
-  "etag": "\"-2NioU2H8y8siEzrBOV_qzRI6kQ/GB_1RM82OKxTSfzeb_5bvCbmQ40\"",
+  "etag": "\"-2NioU2H8y8siEzrBOV_qzRI6kQ/6fuP5JDS7CDwzVsd3cAc59pg_GE\"",
   "icons": {
     "x16": "https://ssl.gstatic.com/docs/doclist/images/drive_icon_16.png",
     "x32": "https://ssl.gstatic.com/docs/doclist/images/drive_icon_32.png"
@@ -3521,7 +3521,7 @@
       }
     }
   },
-  "revision": "20200922",
+  "revision": "20201012",
   "rootUrl": "https://www.googleapis.com/",
   "schemas": {
     "About": {
@@ -5192,7 +5192,7 @@
           "type": "object"
         },
         "thumbnailLink": {
-          "description": "A short-lived link to the file's thumbnail. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content.",
+          "description": "A short-lived link to the file's thumbnail. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content. If the file isn't shared publicly, the URL returned in Files.thumbnailLink must be fetched using a credentialed request.",
           "type": "string"
         },
         "thumbnailVersion": {
@@ -5716,7 +5716,7 @@
           "type": "boolean"
         },
         "publishedLink": {
-          "description": "A link to the published revision.",
+          "description": "A link to the published revision. This is only populated for Google Sites files.",
           "type": "string"
         },
         "publishedOutsideDomain": {

discovery/drive-v3.json

@@ -35,7 +35,7 @@
   "description": "Manages files in Drive including uploading, downloading, searching, detecting changes, and updating sharing permissions.",
   "discoveryVersion": "v1",
   "documentationLink": "https://developers.google.com/drive/",
-  "etag": "\"-2NioU2H8y8siEzrBOV_qzRI6kQ/lYzeVghRp2AhwBoE0RMEl0_BZkA\"",
+  "etag": "\"-2NioU2H8y8siEzrBOV_qzRI6kQ/_4ojy4QxfvTPR9kgosczqy5b6UE\"",
   "icons": {
     "x16": "https://ssl.gstatic.com/docs/doclist/images/drive_icon_16.png",
     "x32": "https://ssl.gstatic.com/docs/doclist/images/drive_icon_32.png"
@@ -2185,7 +2185,7 @@
       }
     }
   },
-  "revision": "20200922",
+  "revision": "20201012",
   "rootUrl": "https://www.googleapis.com/",
   "schemas": {
     "About": {
@@ -3272,7 +3272,7 @@
           "type": "string"
         },
         "thumbnailLink": {
-          "description": "A short-lived link to the file's thumbnail, if available. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content.",
+          "description": "A short-lived link to the file's thumbnail, if available. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content. If the file isn't shared publicly, the URL returned in Files.thumbnailLink must be fetched using a credentialed request.",
           "type": "string"
         },
         "thumbnailVersion": {
@@ -3666,7 +3666,7 @@
           "type": "boolean"
         },
         "publishedLink": {
-          "description": "A link to the published revision.",
+          "description": "A link to the published revision. This is only populated for Google Sites files.",
           "type": "string"
         },
         "publishedOutsideDomain": {

src/apis/drive/v2.ts

@@ -1164,7 +1164,7 @@ export namespace drive_v2 {
      */
     thumbnail?: {image?: string; mimeType?: string} | null;
     /**
-     * A short-lived link to the file's thumbnail. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content.
+     * A short-lived link to the file's thumbnail. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content. If the file isn't shared publicly, the URL returned in Files.thumbnailLink must be fetched using a credentialed request.
      */
     thumbnailLink?: string | null;
     /**
@@ -1551,7 +1551,7 @@ export namespace drive_v2 {
      */
     published?: boolean | null;
     /**
-     * A link to the published revision.
+     * A link to the published revision. This is only populated for Google Sites files.
      */
     publishedLink?: string | null;
     /**

src/apis/drive/v3.ts

@@ -745,7 +745,7 @@ export namespace drive_v3 {
      */
     teamDriveId?: string | null;
     /**
-     * A short-lived link to the file's thumbnail, if available. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content.
+     * A short-lived link to the file's thumbnail, if available. Typically lasts on the order of hours. Only populated when the requesting app can access the file's content. If the file isn't shared publicly, the URL returned in Files.thumbnailLink must be fetched using a credentialed request.
      */
     thumbnailLink?: string | null;
     /**
@@ -1034,7 +1034,7 @@ export namespace drive_v3 {
      */
     published?: boolean | null;
     /**
-     * A link to the published revision.
+     * A link to the published revision. This is only populated for Google Sites files.
      */
     publishedLink?: string | null;
     /**