[Vulnerability] Upgrade postgresql maven dependency

There is a new vulnerability concerning the postgresql maven dependency → https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-1597

Maven repository: https://mvnrepository.com/artifact/org.postgresql/postgresql

Note, we do not use the default property which is exploited by the vulnerability, so indeed we do not have a vulnerability but as a precaution we update the version.

In Squash 6, we use the 42.5.1 version.

The vulnerability fix is in the 42.5.5, so we need to upgrade to this version.