Bump org.postgresql:postgresql in /frameworks/Kotlin/ktor/ktor (#8754)

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

frameworks/Kotlin/ktor/ktor/pom.xml

@@ -20,7 +20,7 @@
         <hikaricp.version>5.0.0</hikaricp.version>
         <logback.version>1.2.13</logback.version>
         <mysql.version>8.0.28</mysql.version>
-        <postgresql.version>42.4.3</postgresql.version>
+        <postgresql.version>42.7.2</postgresql.version>
     </properties>
 
     <dependencies>