test(deps): update dependency com.google.cloud:google-cloud-conformance-tests to v0.2.4 (#1037)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-conformance-tests](https://togithub.com/googleapis/java-shared-config) | `0.2.3` -> `0.2.4` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-conformance-tests/0.2.4/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-conformance-tests/0.2.4/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-conformance-tests/0.2.4/compatibility-slim/0.2.3)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-conformance-tests/0.2.4/confidence-slim/0.2.3)](https://docs.renovatebot.com/merge-confidence/) |

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pom.xml

@@ -153,7 +153,7 @@
             <dependency>
               <groupId>com.google.cloud</groupId>
               <artifactId>google-cloud-conformance-tests</artifactId>
-              <version>0.2.3</version>
+              <version>0.2.4</version>
             </dependency>
             <dependency>
                 <groupId>com.google.truth</groupId>