Bump org.postgresql:postgresql in /standalone-metastore

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.5.1 to 42.7.2.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pgjdbc/pgjdbc/commits)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

standalone-metastore/pom.xml

@@ -71,7 +71,7 @@
     <mariadb.version>2.5.0</mariadb.version>
     <mssql.version>6.2.1.jre8</mssql.version>
     <mysql.version>8.0.31</mysql.version>
-    <postgres.version>42.5.1</postgres.version>
+    <postgres.version>42.7.2</postgres.version>
     <oracle.version>21.3.0.0</oracle.version>
     <dropwizard-metrics-hadoop-metrics2-reporter.version>0.1.2
     </dropwizard-metrics-hadoop-metrics2-reporter.version>