deps: update dependency com.google.cloud:google-cloud-scheduler-bom to v2.3.0 (#4639)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-scheduler-bom](https://togithub.com/googleapis/java-scheduler) | `2.2.0` -> `2.3.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-scheduler-bom/2.3.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-scheduler-bom/2.3.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-scheduler-bom/2.3.0/compatibility-slim/2.2.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-scheduler-bom/2.3.0/confidence-slim/2.2.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v2.3.0`](https://togithub.com/googleapis/java-scheduler/blob/HEAD/CHANGELOG.md#&#8203;230-httpsgithubcomgoogleapisjava-schedulercomparev220v230-2022-07-01)

[Compare Source](https://togithub.com/googleapis/java-scheduler/compare/v2.2.0...v2.3.0)

##### Features

-   Enable REST transport for most of Java and Go clients ([#&#8203;773](https://togithub.com/googleapis/java-scheduler/issues/773)) ([499ea4c](https://togithub.com/googleapis/java-scheduler/commit/499ea4caf29fa8713e4468b34b323582ac7ebbb7))

##### Dependencies

-   update dependency com.google.cloud:google-cloud-pubsub-bom to v1.119.0 ([#&#8203;766](https://togithub.com/googleapis/java-scheduler/issues/766)) ([f50e8cf](https://togithub.com/googleapis/java-scheduler/commit/f50e8cf230850297e9b219ac0a4736c99391325f))
-   update dependency com.google.cloud:google-cloud-pubsub-bom to v1.119.1 ([#&#8203;769](https://togithub.com/googleapis/java-scheduler/issues/769)) ([c0a770e](https://togithub.com/googleapis/java-scheduler/commit/c0a770e65fe53b2eda747ca9e0dbc4ab494b19e2))
-   update dependency com.google.cloud:google-cloud-shared-dependencies to v2.13.0 ([#&#8203;772](https://togithub.com/googleapis/java-scheduler/issues/772)) ([56819c7](https://togithub.com/googleapis/java-scheduler/commit/56819c7a5a7a5b59519b25a699251953992b91d9))

</details>

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Author: renovate-bot

google-cloud-bom/pom.xml

@@ -702,7 +702,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-scheduler-bom</artifactId>
-        <version>2.2.0</version>
+        <version>2.3.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>