Update dependency org.postgresql:postgresql to v42.7.8

Author: renovate[bot]

build.gradle

@@ -71,7 +71,7 @@ dependencies {
     implementation "org.springdoc:springdoc-openapi-starter-webmvc-api:${springDocVersion}"
 
     // driver for postgres
-    implementation "org.postgresql:postgresql:42.7.4"
+    implementation "org.postgresql:postgresql:42.7.8"
     //driver for h2
     implementation "com.h2database:h2:2.3.232"