Bump org.postgresql:postgresql from 42.4.3 to 42.7.2 in /geowebcache

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.4.3 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]>

geowebcache/pom.xml

@@ -68,7 +68,7 @@
     <log4j.version>2.17.2</log4j.version>
     <h2.version>1.1.119</h2.version>
     <hsql.version>2.7.1</hsql.version>
-    <postgresql.version>42.4.3</postgresql.version>
+    <postgresql.version>42.7.2</postgresql.version>
     <oracle.version></oracle.version>
     <java.awt.headless>true</java.awt.headless>
     <jalopy.phase>disabled</jalopy.phase>