deps: update dependency com.google.protobuf:protobuf-java-util to v3.18.1 (#1089)

* deps: update dependency com.google.protobuf:protobuf-java-util to v3.18.1

* 🦉 Updates from OwlBot

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

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -35,7 +35,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.18.0</version>
+      <version>3.18.1</version>
     </dependency>
 
     <dependency>

samples/snapshot/pom.xml

@@ -35,7 +35,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.18.0</version>
+      <version>3.18.1</version>
     </dependency>
 
     <dependency>