feat(chat): update the API

#### chat:v1

The following keys were added:
- schemas.GoogleAppsCardV1SelectionInput.properties.hintText.description
- schemas.GoogleAppsCardV1SelectionInput.properties.hintText.type

The following keys were changed:
- schemas.DeprecatedEvent.description

Author: yoshi-automation

discovery/chat-v1.json

@@ -1528,7 +1528,7 @@
       }
     }
   },
-  "revision": "20250619",
+  "revision": "20250706",
   "rootUrl": "https://chat.googleapis.com/",
   "schemas": {
     "AccessSettings": {
@@ -2234,7 +2234,7 @@
       "type": "object"
     },
     "DeprecatedEvent": {
-      "description": "A Google Chat app interaction event that represents and contains data about a user's interaction with a Chat app. To configure your Chat app to receive interaction events, see [Receive and respond to user interactions](https://developers.google.com/workspace/chat/receive-respond-interactions). In addition to receiving events from user interactions, Chat apps can receive events about changes to spaces, such as when a new member is added to a space. To learn about space events, see [Work with events from Google Chat](https://developers.google.com/workspace/chat/events-overview).",
+      "description": " A Google Chat app interaction event that represents and contains data about a user's interaction with a Chat app. To configure your Chat app to receive interaction events, see [Receive and respond to user interactions](https://developers.google.com/workspace/chat/receive-respond-interactions). In addition to receiving events from user interactions, Chat apps can receive events about changes to spaces, such as when a new member is added to a space. To learn about space events, see [Work with events from Google Chat](https://developers.google.com/workspace/chat/events-overview). Note: This event is only used for [Chat interaction events](https://developers.google.com/workspace/chat/receive-respond-interactions). If your Chat app is built as a [Google Workspace add-on](https://developers.google.com/workspace/add-ons/chat/build), see [Chat event objects](https://developers.google.com/workspace/add-ons/concepts/event-objects#chat-event-object) in the add-ons documentation.",
       "id": "DeprecatedEvent",
       "properties": {
         "action": {
@@ -3408,6 +3408,10 @@
           "$ref": "GoogleAppsCardV1Action",
           "description": "An external data source, such as a relational database."
         },
+        "hintText": {
+          "description": "Optional. Text that appears below the selection input field meant to assist users by prompting them to enter a certain value. This text is always visible. Only supported by Google Workspace Workflows, but not Google Chat API or Google Workspace Add-ons.",
+          "type": "string"
+        },
         "items": {
           "description": "An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.",
           "items": {

src/apis/chat/v1.ts

@@ -575,7 +575,7 @@ export namespace chat_v1 {
     deletionType?: string | null;
   }
   /**
-   * A Google Chat app interaction event that represents and contains data about a user's interaction with a Chat app. To configure your Chat app to receive interaction events, see [Receive and respond to user interactions](https://developers.google.com/workspace/chat/receive-respond-interactions). In addition to receiving events from user interactions, Chat apps can receive events about changes to spaces, such as when a new member is added to a space. To learn about space events, see [Work with events from Google Chat](https://developers.google.com/workspace/chat/events-overview).
+   *  A Google Chat app interaction event that represents and contains data about a user's interaction with a Chat app. To configure your Chat app to receive interaction events, see [Receive and respond to user interactions](https://developers.google.com/workspace/chat/receive-respond-interactions). In addition to receiving events from user interactions, Chat apps can receive events about changes to spaces, such as when a new member is added to a space. To learn about space events, see [Work with events from Google Chat](https://developers.google.com/workspace/chat/events-overview). Note: This event is only used for [Chat interaction events](https://developers.google.com/workspace/chat/receive-respond-interactions). If your Chat app is built as a [Google Workspace add-on](https://developers.google.com/workspace/add-ons/chat/build), see [Chat event objects](https://developers.google.com/workspace/add-ons/concepts/event-objects#chat-event-object) in the add-ons documentation.
    */
   export interface Schema$DeprecatedEvent {
     /**
@@ -1386,6 +1386,10 @@ export namespace chat_v1 {
      * An external data source, such as a relational database.
      */
     externalDataSource?: Schema$GoogleAppsCardV1Action;
+    /**
+     * Optional. Text that appears below the selection input field meant to assist users by prompting them to enter a certain value. This text is always visible. Only supported by Google Workspace Workflows, but not Google Chat API or Google Workspace Add-ons.
+     */
+    hintText?: string | null;
     /**
      * An array of selectable items. For example, an array of radio buttons or checkboxes. Supports up to 100 items.
      */