deps: update dependency com.google.cloud:google-cloud-pubsub-bom to v…

…1.123.15 (#6059)

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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) | `1.123.14` -> `1.123.15` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub-bom/1.123.15/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub-bom/1.123.15/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub-bom/1.123.15/compatibility-slim/1.123.14)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub-bom/1.123.15/confidence-slim/1.123.14)](https://docs.renovatebot.com/merge-confidence/) |

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### ⚠ Dependency Lookup Warnings ⚠

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### Release Notes

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

### [`v1.123.15`](https://togithub.com/googleapis/java-pubsub/blob/HEAD/CHANGELOG.md#&#8203;112315-httpsgithubcomgoogleapisjava-pubsubcomparev112314v112315-2023-06-22)

[Compare Source](https://togithub.com/googleapis/java-pubsub/compare/v1.123.14...v1.123.15)

##### Bug Fixes

-   Fixing the shutdown logic for streaming subscriber connection ([#&#8203;1613](https://togithub.com/googleapis/java-pubsub/issues/1613)) ([09aff9c](https://togithub.com/googleapis/java-pubsub/commit/09aff9c59bab646c0bae857f3bca9dc8e9eeebd1))

##### Documentation

-   Adding pubsub emulator example ([#&#8203;1602](https://togithub.com/googleapis/java-pubsub/issues/1602)) ([8ded110](https://togithub.com/googleapis/java-pubsub/commit/8ded11041c63f1f75f0612c081ba6b476b6b89b8))

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-bigquery to v2.27.0 ([#&#8203;1599](https://togithub.com/googleapis/java-pubsub/issues/1599)) ([3b4b7d0](https://togithub.com/googleapis/java-pubsub/commit/3b4b7d0522d8eb136800dd546acb8880b8b28e9e))
-   Update dependency com.google.cloud:google-cloud-bigquery to v2.27.1 ([#&#8203;1614](https://togithub.com/googleapis/java-pubsub/issues/1614)) ([a974e08](https://togithub.com/googleapis/java-pubsub/commit/a974e08b45d49ca275c19a4e94e66b4b831a0fad))
-   Update dependency com.google.cloud:google-cloud-bigquery to v2.28.0 ([#&#8203;1626](https://togithub.com/googleapis/java-pubsub/issues/1626)) ([a4a02b4](https://togithub.com/googleapis/java-pubsub/commit/a4a02b4fd0a3827c3e321c56223731f0a828e8c5))
-   Update dependency com.google.cloud:google-cloud-core to v2.20.0 ([#&#8203;1629](https://togithub.com/googleapis/java-pubsub/issues/1629)) ([5f88f4f](https://togithub.com/googleapis/java-pubsub/commit/5f88f4f5f6fd1c8f2c0e7523b6919a6a477d785c))
-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.12.0 ([#&#8203;1630](https://togithub.com/googleapis/java-pubsub/issues/1630)) ([b444a9d](https://togithub.com/googleapis/java-pubsub/commit/b444a9d825300519681a205a833ae9d816e89cf2))
-   Update dependency org.graalvm.buildtools:junit-platform-native to v0.9.23 ([#&#8203;1623](https://togithub.com/googleapis/java-pubsub/issues/1623)) ([b5f8e49](https://togithub.com/googleapis/java-pubsub/commit/b5f8e4961dd473c98641d8b78c958db1e0e8d01e))
-   Update dependency org.graalvm.buildtools:native-maven-plugin to v0.9.23 ([#&#8203;1624](https://togithub.com/googleapis/java-pubsub/issues/1624)) ([68ada24](https://togithub.com/googleapis/java-pubsub/commit/68ada243897a763e04d4858ad052050e09326371))
-   Update dependency org.xerial.snappy:snappy-java to v1.1.10.1 - abandoned ([#&#8203;1616](https://togithub.com/googleapis/java-pubsub/issues/1616)) ([48ec282](https://togithub.com/googleapis/java-pubsub/commit/48ec282753f8068df135cee55febe5dba97be1b5))
-   Update dependency org.xerial.snappy:snappy-java to v1.1.10.1 \[security] ([#&#8203;1620](https://togithub.com/googleapis/java-pubsub/issues/1620)) ([a1cb267](https://togithub.com/googleapis/java-pubsub/commit/a1cb2673f5e6556472a87a0fb2acbc3e0ddfd933))

</details>

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google-cloud-bom/pom.xml

@@ -224,7 +224,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-pubsub-bom</artifactId>
-        <version>1.123.14</version>
+        <version>1.123.15</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>