deps: update dependency org.springframework.boot:spring-boot-starter-test to v2.6.2 (#667)
deps: update dependency org.springframework.boot:spring-boot-starter-test to v2.6.2 (#667)

* deps: update dependency org.springframework.boot:spring-boot-starter-test to v2.6.2

* 🦉 Updates from OwlBot

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