feat(texttospeech): update the API

#### texttospeech:v1beta1

The following keys were added:
- schemas.AdvancedVoiceOptions.properties.relaxSafetyFilters.description
- schemas.AdvancedVoiceOptions.properties.relaxSafetyFilters.type

#### texttospeech:v1

The following keys were added:
- schemas.AdvancedVoiceOptions.properties.relaxSafetyFilters.description
- schemas.AdvancedVoiceOptions.properties.relaxSafetyFilters.type

Author: yoshi-automation

discovery/texttospeech-v1.json

@@ -323,7 +323,7 @@
       }
     }
   },
-  "revision": "20251001",
+  "revision": "20251014",
   "rootUrl": "https://texttospeech.googleapis.com/",
   "schemas": {
     "AdvancedVoiceOptions": {
@@ -333,6 +333,10 @@
         "lowLatencyJourneySynthesis": {
           "description": "Only for Journey voices. If false, the synthesis is context aware and has a higher latency.",
           "type": "boolean"
+        },
+        "relaxSafetyFilters": {
+          "description": "Optional. Input only. If true, relaxes safety filters for Gemini TTS. Only supported for accounts linked to Invoiced (Offline) Cloud billing accounts. Otherwise, will return result google.rpc.Code.INVALID_ARGUMENT.",
+          "type": "boolean"
         }
       },
       "type": "object"

discovery/texttospeech-v1beta1.json

@@ -266,7 +266,7 @@
       }
     }
   },
-  "revision": "20251001",
+  "revision": "20251014",
   "rootUrl": "https://texttospeech.googleapis.com/",
   "schemas": {
     "AdvancedVoiceOptions": {
@@ -276,6 +276,10 @@
         "lowLatencyJourneySynthesis": {
           "description": "Only for Journey voices. If false, the synthesis is context aware and has a higher latency.",
           "type": "boolean"
+        },
+        "relaxSafetyFilters": {
+          "description": "Optional. Input only. If true, relaxes safety filters for Gemini TTS. Only supported for accounts linked to Invoiced (Offline) Cloud billing accounts. Otherwise, will return result google.rpc.Code.INVALID_ARGUMENT.",
+          "type": "boolean"
         }
       },
       "type": "object"

src/apis/texttospeech/v1.ts

@@ -138,6 +138,10 @@ export namespace texttospeech_v1 {
      * Only for Journey voices. If false, the synthesis is context aware and has a higher latency.
      */
     lowLatencyJourneySynthesis?: boolean | null;
+    /**
+     * Optional. Input only. If true, relaxes safety filters for Gemini TTS. Only supported for accounts linked to Invoiced (Offline) Cloud billing accounts. Otherwise, will return result google.rpc.Code.INVALID_ARGUMENT.
+     */
+    relaxSafetyFilters?: boolean | null;
   }
   /**
    * Description of audio data to be synthesized.

src/apis/texttospeech/v1beta1.ts

@@ -136,6 +136,10 @@ export namespace texttospeech_v1beta1 {
      * Only for Journey voices. If false, the synthesis is context aware and has a higher latency.
      */
     lowLatencyJourneySynthesis?: boolean | null;
+    /**
+     * Optional. Input only. If true, relaxes safety filters for Gemini TTS. Only supported for accounts linked to Invoiced (Offline) Cloud billing accounts. Otherwise, will return result google.rpc.Code.INVALID_ARGUMENT.
+     */
+    relaxSafetyFilters?: boolean | null;
   }
   /**
    * Description of audio data to be synthesized.