Bump org.postgresql:postgresql in /frameworks/Java/undertow (#8748)

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.4.1 to 42.7.2.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pgjdbc/pgjdbc/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

frameworks/Java/undertow/pom.xml

@@ -19,7 +19,7 @@
     <maven-dependency-plugin.version>3.3.0</maven-dependency-plugin.version>
     <maven-jar-plugin.version>3.2.2</maven-jar-plugin.version>
     <mustache.version>0.9.10</mustache.version>
-    <postgresql.version>42.4.1</postgresql.version>
+    <postgresql.version>42.7.2</postgresql.version>
     <undertow.version>2.3.5.Final</undertow.version>
   </properties>