Update dependency org.postgresql:postgresql to v42.7.12 [SECURITY] (#4299)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

core/build.gradle

@@ -131,7 +131,7 @@ dependencies {
             'com.thetransactioncompany:cors-filter:2.9.1',
             // Hibernate & Postgres
             'org.hibernate:hibernate-core:5.4.33',
-            'org.postgresql:postgresql:42.7.11',
+            'org.postgresql:postgresql:42.7.12',
             'com.vladmihalcea:hibernate-types-52:2.17.3',
             'com.mchange:c3p0:0.12.0',
             "org.springframework:spring-orm:$springVersion",