Bump postgresql in /containers/java-postgres/test-project (#1287)

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.3.1 to 42.3.2.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pgjdbc/pgjdbc/compare/REL42.3.1...REL42.3.2)

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

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containers/java-postgres/test-project/pom.xml

@@ -23,7 +23,7 @@
     <dependency>
       <groupId>org.postgresql</groupId>
       <artifactId>postgresql</artifactId>
-      <version>42.3.1</version>
+      <version>42.3.2</version>
     </dependency>
   </dependencies>