deps: update dependency com.google.cloud:google-cloud-pubsub-bom to v1.123.11 (#5952)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-pubsub-bom](https://togithub.com/googleapis/java-pubsub) | `1.123.10` -> `1.123.11` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub-bom/1.123.11/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub-bom/1.123.11/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub-bom/1.123.11/compatibility-slim/1.123.10)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub-bom/1.123.11/confidence-slim/1.123.10)](https://docs.renovatebot.com/merge-confidence/) |

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### ⚠ Dependency Lookup Warnings ⚠

Warnings were logged while processing this repo. Please check the Dependency Dashboard for more information.

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### Release Notes

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

### [`v1.123.11`](https://togithub.com/googleapis/java-pubsub/blob/HEAD/CHANGELOG.md#&#8203;112311-httpsgithubcomgoogleapisjava-pubsubcomparev112310v112311-2023-04-27)

[Compare Source](https://togithub.com/googleapis/java-pubsub/compare/v1.123.10...v1.123.11)

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-core to v2.15.0 ([#&#8203;1558](https://togithub.com/googleapis/java-pubsub/issues/1558)) ([acf0a4f](https://togithub.com/googleapis/java-pubsub/commit/acf0a4f1b893b5be19167e87b958e722e53b2aee))
-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.8.0 ([#&#8203;1561](https://togithub.com/googleapis/java-pubsub/issues/1561)) ([13bfd09](https://togithub.com/googleapis/java-pubsub/commit/13bfd09a9ba81e725a61f2b36c5d38fabcd8df56))
-   Update dependency org.junit.vintage:junit-vintage-engine to v5.9.3 ([#&#8203;1563](https://togithub.com/googleapis/java-pubsub/issues/1563)) ([c2329d2](https://togithub.com/googleapis/java-pubsub/commit/c2329d289d3447e72904d20e9c89065b59d7e6de))

</details>

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Author: renovate-bot

google-cloud-bom/pom.xml

@@ -224,7 +224,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-pubsub-bom</artifactId>
-        <version>1.123.10</version>
+        <version>1.123.11</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>