Update dependency org.postgresql:postgresql to v42.7.8

Author: renovate[bot]

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ aalto = '1.3.3'
 staxmate = '2.4.1'
 rxjava-jdbc = '0.1.4-ii.1'
 hikaricp = '6.3.2'
-postgresql = '42.7.7'
+postgresql = '42.7.8'
 sqlite = '3.50.3.0'
 schemacrawler = '16.26.3'
 jsqlparser = '5.3'