chore: regenerate bigquerydatatransfer client (googleapis#29467)

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-bigquerydatatransfer/v1/2.0.0/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-bigquerydatatransfer</artifactId>
-      <version>v1-rev20250813-2.0.0</version>
+      <version>v1-rev20250906-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-bigquerydatatransfer:v1-rev20250813-2.0.0'
+  implementation 'com.google.apis:google-api-services-bigquerydatatransfer:v1-rev20250906-2.0.0'
 }
 ```
 

clients/google-api-services-bigquerydatatransfer/v1/2.0.0/com/google/api/services/bigquerydatatransfer/v1/BigQueryDataTransfer.java

@@ -1261,22 +1261,22 @@ public List setName(java.lang.String name) {
         }
 
         /**
-         * Optional. Do not use this field. It is unsupported and is ignored unless explicitly
-         * documented otherwise. This is primarily for internal usage.
+         * Optional. Unless explicitly documented otherwise, don't use this unsupported field which
+         * is primarily intended for internal usage.
          */
         @com.google.api.client.util.Key
         private java.util.List<java.lang.String> extraLocationTypes;
 
-        /** Optional. Do not use this field. It is unsupported and is ignored unless explicitly documented
-       otherwise. This is primarily for internal usage.
+        /** Optional. Unless explicitly documented otherwise, don't use this unsupported field which is
+       primarily intended for internal usage.
          */
         public java.util.List<java.lang.String> getExtraLocationTypes() {
           return extraLocationTypes;
         }
 
         /**
-         * Optional. Do not use this field. It is unsupported and is ignored unless explicitly
-         * documented otherwise. This is primarily for internal usage.
+         * Optional. Unless explicitly documented otherwise, don't use this unsupported field which
+         * is primarily intended for internal usage.
          */
         public List setExtraLocationTypes(java.util.List<java.lang.String> extraLocationTypes) {
           this.extraLocationTypes = extraLocationTypes;

clients/google-api-services-bigquerydatatransfer/v1/2.0.0/pom.xml

@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-bigquerydatatransfer</artifactId>
-  <version>v1-rev20250813-2.0.0</version>
-  <name>BigQuery Data Transfer API v1-rev20250813-2.0.0</name>
+  <version>v1-rev20250906-2.0.0</version>
+  <name>BigQuery Data Transfer API v1-rev20250906-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>

clients/google-api-services-bigquerydatatransfer/v1/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-bigquerydatatransfer</artifactId>
-      <version>v1-rev20250813-2.0.0</version>
+      <version>v1-rev20250906-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-bigquerydatatransfer:v1-rev20250813-2.0.0'
+  implementation 'com.google.apis:google-api-services-bigquerydatatransfer:v1-rev20250906-2.0.0'
 }
 ```