Bump postgresql from 42.4.1 to 42.4.3 in /frameworks/Java/javalin

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.4.1 to 42.4.3.
- [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/REL42.4.1...REL42.4.3)

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

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

frameworks/Java/javalin/pom.xml

@@ -15,7 +15,7 @@
         <slf4j.version>1.7.30</slf4j.version>
         <jackson.version>2.13.4.1</jackson.version>
         <hikaricp.version>4.0.2</hikaricp.version>
-        <postgresql.version>42.4.1</postgresql.version>
+        <postgresql.version>42.4.3</postgresql.version>
         <mongodb.version>4.2.1</mongodb.version>
         <pebble.version>3.1.5</pebble.version>
     </properties>