feat: add enable connection pool to sample (#2192)

* feat: add enable connection pool to sample * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md --------- Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: yirutang

README.md

@@ -50,20 +50,20 @@ If you are using Maven without the BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.18.0')
+implementation platform('com.google.cloud:libraries-bom:26.19.0')
 
 implementation 'com.google.cloud:google-cloud-bigquerystorage'
 ```
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-bigquerystorage:2.40.0'
+implementation 'com.google.cloud:google-cloud-bigquerystorage:2.40.1'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-bigquerystorage" % "2.40.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-bigquerystorage" % "2.40.1"
 ```
 <!-- {x-version-update-end} -->
 
@@ -220,7 +220,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-bigquerystorage/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-bigquerystorage.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-bigquerystorage/2.40.0
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-bigquerystorage/2.40.1
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles

samples/snippets/src/main/java/com/example/bigquerystorage/WriteToDefaultStream.java

@@ -177,6 +177,7 @@ public void initialize(TableName parentTable)
  .setKeepAliveWithoutCalls(true)
  .setChannelsPerCpu(2)
  .build())
+ .setEnableConnectionPool(true)
  .build();
  }