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

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/servlet/pom.xml

@@ -108,7 +108,7 @@
 				<dependency>
 					<groupId>org.postgresql</groupId>
 					<artifactId>postgresql</artifactId>
-					<version>42.4.1</version>
+					<version>42.4.3</version>
 				</dependency>
 			</dependencies>
 			<build>