chore(deps): update dependency com.google.cloud:libraries-bom to v26.18.0 (#1645)

* chore(deps): update dependency com.google.cloud:libraries-bom to v26.18.0

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

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Author: renovate-bot

README.md

@@ -19,7 +19,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file:
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>26.17.0</version>
+      <version>26.18.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -52,7 +52,7 @@ If you are using Maven without the BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.17.0')
+implementation platform('com.google.cloud:libraries-bom:26.18.0')
 
 implementation 'com.google.cloud:google-cloud-pubsub'
 ```

samples/native-image-sample/pom.xml

@@ -30,7 +30,7 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>libraries-bom</artifactId>
-        <version>26.17.0</version>
+        <version>26.18.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>

samples/snippets/pom.xml

@@ -45,7 +45,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>libraries-bom</artifactId>
-        <version>26.17.0</version>
+        <version>26.18.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>