fix(dialogflow): update the API

#### dialogflow:v3

The following keys were changed:
- schemas.GoogleCloudDialogflowCxV3SecuritySettingsAudioExportSettings.properties.audioExportPattern.description

Author: yoshi-automation

discovery/dialogflow-v3.json

@@ -5309,7 +5309,7 @@
       }
     }
   },
-  "revision": "20250804",
+  "revision": "20250812",
   "rootUrl": "https://dialogflow.googleapis.com/",
   "schemas": {
     "GoogleCloudDialogflowCxV3Action": {
@@ -10800,7 +10800,7 @@
       "id": "GoogleCloudDialogflowCxV3SecuritySettingsAudioExportSettings",
       "properties": {
         "audioExportPattern": {
-          "description": "Filename pattern for exported audio.",
+          "description": "Filename pattern for exported audio. {conversation} and {timestamp} are placeholders that will be replaced with the conversation ID and epoch micros of the conversation. For example, \"{conversation}/recording_{timestamp}.mulaw\".",
           "type": "string"
         },
         "audioFormat": {

src/apis/dialogflow/v3.ts

@@ -5837,7 +5837,7 @@ export namespace dialogflow_v3 {
    */
   export interface Schema$GoogleCloudDialogflowCxV3SecuritySettingsAudioExportSettings {
     /**
-     * Filename pattern for exported audio.
+     * Filename pattern for exported audio. {conversation\} and {timestamp\} are placeholders that will be replaced with the conversation ID and epoch micros of the conversation. For example, "{conversation\}/recording_{timestamp\}.mulaw".
      */
     audioExportPattern?: string | null;
     /**