chore(ci): bump btlr version (#5456)
chore(ci): bump btlr version (#5456)

Bumps btlr to the newest version. The new version prints logs as each command is completed. 


GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples