deps: update dependency com.google.cloud:google-cloud-bigquerydatatra…

…nsfer-bom to v2.3.0 (#4650)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-bigquerydatatransfer-bom](https://togithub.com/googleapis/java-bigquerydatatransfer) | `2.2.6` -> `2.3.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquerydatatransfer-bom/2.3.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquerydatatransfer-bom/2.3.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquerydatatransfer-bom/2.3.0/compatibility-slim/2.2.6)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquerydatatransfer-bom/2.3.0/confidence-slim/2.2.6)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v2.3.0`](https://togithub.com/googleapis/java-bigquerydatatransfer/blob/HEAD/CHANGELOG.md#&#8203;230-httpsgithubcomgoogleapisjava-bigquerydatatransfercomparev226v230-2022-07-01)

[Compare Source](https://togithub.com/googleapis/java-bigquerydatatransfer/compare/v2.2.6...v2.3.0)

##### Features

-   Enable REST transport for most of Java and Go clients ([#&#8203;1402](https://togithub.com/googleapis/java-bigquerydatatransfer/issues/1402)) ([ee7c19b](https://togithub.com/googleapis/java-bigquerydatatransfer/commit/ee7c19bdc919d01e5f43b471f63b588f7b9a4008))

##### Dependencies

-   update dependency com.google.cloud:google-cloud-shared-dependencies to v2.13.0 ([#&#8203;1401](https://togithub.com/googleapis/java-bigquerydatatransfer/issues/1401)) ([20e4915](https://togithub.com/googleapis/java-bigquerydatatransfer/commit/20e491525db0f385c58e4a64e2c42e81f3cec106))
-   update dependency com.google.protobuf:protobuf-java-util to v3.21.2 ([#&#8203;1404](https://togithub.com/googleapis/java-bigquerydatatransfer/issues/1404)) ([aaa96ef](https://togithub.com/googleapis/java-bigquerydatatransfer/commit/aaa96ef086d8503cbd54761f105163fa87b87c63))

</details>

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google-cloud-bom/pom.xml

@@ -226,7 +226,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigquerydatatransfer-bom</artifactId>
-        <version>2.2.6</version>
+        <version>2.3.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>