deps: update dependency com.google.cloud:google-cloud-pubsub to v1.123.18 (#1457)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-pubsub](https://togithub.com/googleapis/java-pubsub) | `1.123.17` -> `1.123.18` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:google-cloud-pubsub/1.123.18?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.cloud:google-cloud-pubsub/1.123.18?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.cloud:google-cloud-pubsub/1.123.17/1.123.18?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.cloud:google-cloud-pubsub/1.123.17/1.123.18?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-pubsub (com.google.cloud:google-cloud-pubsub)</summary>

### [`v1.123.18`](https://togithub.com/googleapis/java-pubsub/blob/HEAD/CHANGELOG.md#112318-2023-07-17)

[Compare Source](https://togithub.com/googleapis/java-pubsub/compare/v1.123.17...v1.123.18)

##### Documentation

-   Tightened requirements on cloud storage subscription filename suffixes ([#&#8203;1639](https://togithub.com/googleapis/java-pubsub/issues/1639)) ([34a182a](https://togithub.com/googleapis/java-pubsub/commit/34a182a1655c843cd728850b278ba2e9ce9a5680))

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-core to v2.21.0 ([#&#8203;1650](https://togithub.com/googleapis/java-pubsub/issues/1650)) ([69879d4](https://togithub.com/googleapis/java-pubsub/commit/69879d4c9d7a220f9c5a38b144d49e71ad3b94d0))
-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.13.0 ([#&#8203;1651](https://togithub.com/googleapis/java-pubsub/issues/1651)) ([83fdbe2](https://togithub.com/googleapis/java-pubsub/commit/83fdbe2435d8fa03b5648272a794874ff910fcb6))
-   Update dependency com.google.protobuf:protobuf-java-util to v3.23.4 ([#&#8203;1649](https://togithub.com/googleapis/java-pubsub/issues/1649)) ([9f9c5ca](https://togithub.com/googleapis/java-pubsub/commit/9f9c5ca2abddde274c79cf36bf2aea91b7b8b455))
-   Update dependency org.apache.avro:avro to v1.11.2 ([#&#8203;1646](https://togithub.com/googleapis/java-pubsub/issues/1646)) ([5859fe4](https://togithub.com/googleapis/java-pubsub/commit/5859fe4c6540fa577942f38e117798d3c3cdc498))
-   Update dependency org.xerial.snappy:snappy-java to v1.1.10.2 ([#&#8203;1654](https://togithub.com/googleapis/java-pubsub/issues/1654)) ([05445f0](https://togithub.com/googleapis/java-pubsub/commit/05445f0ccf1cd78a604ec267d7a146cdd1770c59))

</details>

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Author: renovate-bot

README.md

@@ -25,7 +25,7 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsub</artifactId>
-  <version>1.123.17</version>
+  <version>1.123.18</version>
 </dependency>
 
 ```

google-cloud-pubsublite/pom.xml

@@ -46,7 +46,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.123.17</version>
+      <version>1.123.18</version>
     </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>

samples/snapshot/pom.xml

@@ -51,7 +51,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.123.17</version>
+      <version>1.123.18</version>
     </dependency>
 
     <dependency>

samples/snippets/pom.xml

@@ -51,7 +51,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.123.17</version>
+      <version>1.123.18</version>
     </dependency>
     <!-- [END pubsublite_java_dependencies] -->
     <!-- [END pubsublite_install_without_bom] -->