build: Skip deploying vertexai.

Author: blakeli0

java-vertexai/pom.xml

@@ -22,6 +22,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-vertexai-parent</site.installationModule>
+    <maven.deploy.skip>true</maven.deploy.skip>
   </properties>
 
   <dependencyManagement>