deps: update dependency com.google.cloud:google-cloud-core to v2.15.0 (#1558)

* deps: update dependency com.google.cloud:google-cloud-core to v2.16.0

* 🦉 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

@@ -52,7 +52,7 @@ 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:26.12.0')
+implementation platform('com.google.cloud:libraries-bom:26.13.0')
 
 implementation 'com.google.cloud:google-cloud-pubsub'
 ```

samples/install-without-bom/pom.xml

@@ -80,7 +80,7 @@
     <dependency>
       <groupId>com.google.cloudgroupId>
       <artifactId>google-cloud-coreartifactId>
-      <version>2.12.0version>
+      <version>2.16.0version>
       <classifier>testsclassifier>
     dependency>
     <dependency>

samples/snapshot/pom.xml

@@ -79,7 +79,7 @@
     <dependency>
       <groupId>com.google.cloudgroupId>
       <artifactId>google-cloud-coreartifactId>
-      <version>2.12.0version>
+      <version>2.16.0version>
       <classifier>testsclassifier>
     dependency>
     <dependency>

samples/snippets/pom.xml

@@ -94,7 +94,7 @@
     <dependency>
       <groupId>com.google.cloudgroupId>
       <artifactId>google-cloud-coreartifactId>
-      <version>2.12.0version>
+      <version>2.16.0version>
       <classifier>testsclassifier>
     dependency>