chore(deps): update dependency com.google.cloud:google-cloud-pubsub to v1.123.8 (#1546)

* chore(deps): update dependency com.google.cloud:google-cloud-pubsub to v1.123.8

* 🦉 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 

Author: renovate-bot

README.md

@@ -44,28 +44,28 @@ If you are using Maven without the BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloudgroupId>
   <artifactId>google-cloud-pubsubartifactId>
-  <version>1.123.7version>
+  <version>1.123.8version>
 dependency>
 
 ```
 
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.11.0')
+implementation platform('com.google.cloud:libraries-bom:26.12.0')
 
 implementation 'com.google.cloud:google-cloud-pubsub'
 ```
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-pubsub:1.123.7'
+implementation 'com.google.cloud:google-cloud-pubsub:1.123.8'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-pubsub" % "1.123.7"
+libraryDependencies += "com.google.cloud" % "google-cloud-pubsub" % "1.123.8"
 ```
 
 
@@ -406,7 +406,7 @@ 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-pubsub/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-pubsub.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-pubsub/1.123.7
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-pubsub/1.123.8
 [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/install-without-bom/pom.xml

@@ -44,7 +44,7 @@
     <dependency>
       <groupId>com.google.cloudgroupId>
       <artifactId>google-cloud-pubsubartifactId>
-      <version>1.123.7version>
+      <version>1.123.8version>
     dependency>