Bump postgresql from 42.2.11 to 42.2.12 (#6254)

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.11 to 42.2.12.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.2.11...REL42.2.12)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

build.gradle

@@ -144,7 +144,7 @@ dependencies {
 
     implementation group: 'org.mariadb.jdbc', name: 'mariadb-java-client', version: '2.6.0'
 
-    implementation 'org.postgresql:postgresql:42.2.11'
+    implementation 'org.postgresql:postgresql:42.2.12'
 
     implementation ('com.oracle.ojdbc:ojdbc10:19.3.0.0') {
         // causing module issues