deps: update gcr.io/cloud-devrel-public-resources/storage-testbench docker tag to v0.42.0 (#2441)

* deps: update gcr.io/cloud-devrel-public-resources/storage-testbench docker tag to v0.42.0

* 🦉 Updates from OwlBot post-processor

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README.md

@@ -50,7 +50,7 @@ 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:26.33.0')
+implementation platform('com.google.cloud:libraries-bom:26.34.0')
 
 implementation 'com.google.cloud:google-cloud-storage'
 ```

google-cloud-storage/src/test/resources/com/google/cloud/storage/it/runner/registry/Dockerfile

@@ -1 +1 @@
-FROM gcr.io/cloud-devrel-public-resources/storage-testbench:v0.41.0
+FROM gcr.io/cloud-devrel-public-resources/storage-testbench:v0.42.0