chore: regenerate dialogflow client (googleapis#28051)

Generated in GitHub action: https://togithub.com/googleapis/googleapis/google-api-java-client-services/actions/workflows/codegen.yaml

Author: yoshi-code-bot

clients/google-api-services-dialogflow/v3beta1/2.0.0/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-dialogflow</artifactId>
-      <version>v3beta1-rev20250617-2.0.0</version>
+      <version>v3beta1-rev20250625-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-dialogflow:v3beta1-rev20250617-2.0.0'
+  implementation 'com.google.apis:google-api-services-dialogflow:v3beta1-rev20250625-2.0.0'
 }
 ```
 

clients/google-api-services-dialogflow/v3beta1/2.0.0/com/google/api/services/dialogflow/v3beta1/model/GoogleCloudDialogflowCxV3beta1VoiceSelectionParams.java

@@ -38,6 +38,13 @@ public final class GoogleCloudDialogflowCxV3beta1VoiceSelectionParams extends co
   @com.google.api.client.util.Key
   private java.lang.String name;
 
+  /**
+   * Optional. The name of the second voice (non-English) if language detection is supported.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.lang.String secondLanguageModel;
+
   /**
    * Optional. The preferred gender of the voice. If not set, the service will choose a voice based
    * on the other parameters such as language_code and name. Note that this is only a preference,
@@ -69,6 +76,23 @@ public GoogleCloudDialogflowCxV3beta1VoiceSelectionParams setName(java.lang.Stri
     return this;
   }
 
+  /**
+   * Optional. The name of the second voice (non-English) if language detection is supported.
+   * @return value or {@code null} for none
+   */
+  public java.lang.String getSecondLanguageModel() {
+    return secondLanguageModel;
+  }
+
+  /**
+   * Optional. The name of the second voice (non-English) if language detection is supported.
+   * @param secondLanguageModel secondLanguageModel or {@code null} for none
+   */
+  public GoogleCloudDialogflowCxV3beta1VoiceSelectionParams setSecondLanguageModel(java.lang.String secondLanguageModel) {
+    this.secondLanguageModel = secondLanguageModel;
+    return this;
+  }
+
   /**
    * Optional. The preferred gender of the voice. If not set, the service will choose a voice based
    * on the other parameters such as language_code and name. Note that this is only a preference,

clients/google-api-services-dialogflow/v3beta1/2.0.0/pom.xml

@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-dialogflow</artifactId>
-  <version>v3beta1-rev20250617-2.0.0</version>
-  <name>Dialogflow API v3beta1-rev20250617-2.0.0</name>
+  <version>v3beta1-rev20250625-2.0.0</version>
+  <name>Dialogflow API v3beta1-rev20250625-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>

clients/google-api-services-dialogflow/v3beta1/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-dialogflow</artifactId>
-      <version>v3beta1-rev20250617-2.0.0</version>
+      <version>v3beta1-rev20250625-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-dialogflow:v3beta1-rev20250617-2.0.0'
+  implementation 'com.google.apis:google-api-services-dialogflow:v3beta1-rev20250625-2.0.0'
 }
 ```