chore: regenerate pubsub client (googleapis#32072)

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-pubsub/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-pubsub</artifactId>
-      <version>v1-rev20260602-2.0.0</version>
+      <version>v1-rev20260609-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-pubsub:v1-rev20260602-2.0.0'
+  implementation 'com.google.apis:google-api-services-pubsub:v1-rev20260609-2.0.0'
 }
 ```
 

clients/google-api-services-pubsub/v1/2.0.0/com/google/api/services/pubsub/model/BigtableConfig.java

@@ -18,9 +18,9 @@
 
 /**
  * Configuration for a Bigtable subscription. The Pub/Sub message will be written to a Bigtable row
- * as follows: - row key: subscription name and message ID delimited by #. - columns: message bytes
- * written to a single column family "data" with an empty-string column qualifier. - cell timestamp:
- * the message publish timestamp.
+ * as follows: - row key: subscription name, message ID hash, and message ID delimited by `#`. -
+ * columns: message bytes written to a single column family `data` with an empty-string column
+ * qualifier. - cell timestamp: the message publish timestamp.
  *
  * <p> This is the Java data model class that specifies how to parse/serialize into the JSON that is
  * transmitted over HTTP when working with the Cloud Pub/Sub API. For a detailed explanation see:

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

@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-pubsub</artifactId>
-  <version>v1-rev20260602-2.0.0</version>
-  <name>Cloud Pub/Sub API v1-rev20260602-2.0.0</name>
+  <version>v1-rev20260609-2.0.0</version>
+  <name>Cloud Pub/Sub API v1-rev20260609-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>

clients/google-api-services-pubsub/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-pubsub</artifactId>
-      <version>v1-rev20260602-2.0.0</version>
+      <version>v1-rev20260609-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-pubsub:v1-rev20260602-2.0.0'
+  implementation 'com.google.apis:google-api-services-pubsub:v1-rev20260609-2.0.0'
 }
 ```