build(deps): bump org.postgresql:postgresql in /textrepo-app

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.6.0 to 42.6.1.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.6.0...REL42.6.1)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-type: direct:production
...

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

textrepo-app/pom.xml

@@ -42,7 +42,7 @@
     <junit5.version>5.6.0</junit5.version>
     <mockito-core.version>3.0.0</mockito-core.version>
     <mockserver.version>5.4.1</mockserver.version>
-    <postgresql.version>42.6.0</postgresql.version>
+    <postgresql.version>42.6.1</postgresql.version>
     <xom.version>1.3.7</xom.version>
   </properties>