deps: update dependency com.google.cloud:google-cloud-build-bom to v2…

….1.4 (#1028)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-build-bom](https://togithub.com/googleapis/java-cloudbuild) | patch | `2.1.1` -> `2.1.4` |

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### Release Notes

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

### [`v2.1.4`](https://togithub.com/googleapis/java-cloudbuild/blob/master/CHANGELOG.md#&#8203;214-httpswwwgithubcomgoogleapisjava-cloudbuildcomparev213v214-2020-10-21)

[Compare Source](https://togithub.com/googleapis/java-cloudbuild/compare/v2.1.3...v2.1.4)

### [`v2.1.3`](https://togithub.com/googleapis/java-cloudbuild/blob/master/CHANGELOG.md#&#8203;213-httpswwwgithubcomgoogleapisjava-cloudbuildcomparev212v213-2020-10-19)

[Compare Source](https://togithub.com/googleapis/java-cloudbuild/compare/v2.1.2...v2.1.3)

### [`v2.1.2`](https://togithub.com/googleapis/java-cloudbuild/blob/master/CHANGELOG.md#&#8203;212-httpswwwgithubcomgoogleapisjava-cloudbuildcomparev211v212-2020-10-12)

[Compare Source](https://togithub.com/googleapis/java-cloudbuild/compare/v2.1.1...v2.1.2)

</details>

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pom.xml

@@ -224,7 +224,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-build-bom</artifactId>
-        <version>2.1.1</version>
+        <version>2.1.4</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>