build(deps): bump org.postgresql:postgresql from 42.7.8 to 42.7.9

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.7.8 to 42.7.9.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.7.8...REL42.7.9)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-version: 42.7.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -124,7 +124,7 @@
         <!-- JDBC Drivers -->
         <lib.jdbc-driver.mssql.version>13.2.1.jre11</lib.jdbc-driver.mssql.version>
         <lib.jdbc-driver.mysql.version>8.2.0</lib.jdbc-driver.mysql.version>
-        <lib.jdbc-driver.postgresql.version>42.7.8</lib.jdbc-driver.postgresql.version>
+        <lib.jdbc-driver.postgresql.version>42.7.9</lib.jdbc-driver.postgresql.version>
         <!-- Maven Plugin Properties -->
         <plugin.retirejs.breakOnFailure>false</plugin.retirejs.breakOnFailure>
         <plugin.protoc-jar.version>3.11.4</plugin.protoc-jar.version>