chore(deps): update dependency org.sonatype.plugins:nexus-staging-maven-plugin to v1.6.12 (#1388)

Co-authored-by: Neenu Shaji <Neenu1995@users.noreply.github.com>

Author: renovate-bot

synthtool/gcp/templates/java_library/samples/pom.xml

@@ -46,7 +46,7 @@
  <plugin>
  <groupId>org.sonatype.plugins</groupId>
  <artifactId>nexus-staging-maven-plugin</artifactId>
- <version>1.6.8</version>
+ <version>1.6.12</version>
  <configuration>
  <skipNexusStagingDeployMojo>true</skipNexusStagingDeployMojo>
  </configuration>