chore(deps): update dependency com.google.cloud:google-cloud-pubsub to v1.123.1 (#1468)

* chore(deps): update dependency com.google.cloud:google-cloud-pubsub to v1.123.1

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java-pubsub/README.md

@@ -43,7 +43,7 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsub</artifactId>
-  <version>1.123.0</version>
+  <version>1.123.1</version>
 </dependency>
 
 ```

java-pubsub/samples/install-without-bom/pom.xml

@@ -44,7 +44,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.123.0</version>
+      <version>1.123.1</version>
     </dependency>
     <!-- [END pubsub_install_without_bom] -->