Bump org.postgresql:postgresql in /profiling/kafka/postgresql-kafka

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.3.8 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] <support@github.com>

profiling/kafka/postgresql-kafka/pom.xml

@@ -35,7 +35,7 @@
     <description>A PostgreSQL to Kafka containeraized application to show profiling practices</description>
 
     <properties>
-        <postgresql-driver-version>42.3.8</postgresql-driver-version>
+        <postgresql-driver-version>42.7.2</postgresql-driver-version>
         <commons-dbcp2-version>2.8.0</commons-dbcp2-version>
     </properties>