chore(deps): update dependency com.google.cloud:google-cloud-workflow…

…s to v0.4.2 (#254)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-workflows](https://togithub.com/googleapis/java-workflows) | `0.4.0` -> `0.4.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-workflows/0.4.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-workflows/0.4.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-workflows/0.4.2/compatibility-slim/0.4.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-workflows/0.4.2/confidence-slim/0.4.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-workflows</summary>

### [`v0.4.2`](https://togithub.com/googleapis/java-workflows/blob/master/CHANGELOG.md#&#8203;042-httpswwwgithubcomgoogleapisjava-workflowscomparev041v042-2021-05-19)

[Compare Source](https://togithub.com/googleapis/java-workflows/compare/v0.4.1...v0.4.2)

### [`v0.4.1`](https://togithub.com/googleapis/java-workflows/blob/master/CHANGELOG.md#&#8203;041-httpswwwgithubcomgoogleapisjava-workflowscomparev040v041-2021-05-14)

[Compare Source](https://togithub.com/googleapis/java-workflows/compare/v0.4.0...v0.4.1)

</details>

---

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java-workflows/samples/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-workflows</artifactId>
-      <version>0.4.0</version>
+      <version>0.4.2</version>
     </dependency>
     <!-- [END workflows_install_without_bom] -->
 

java-workflows/samples/snippets/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-workflows</artifactId>
-      <version>0.4.0</version>
+      <version>0.4.2</version>
     </dependency>
 
     <dependency>