chore(deps): bump org.postgresql:postgresql (#9246)

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.7.1 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
...

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cloud-sql/postgres/client-side-encryption/pom.xml

@@ -63,7 +63,7 @@
     <dependency>
       <groupId>org.postgresql</groupId>
       <artifactId>postgresql</artifactId>
-      <version>42.7.1</version>
+      <version>42.7.2</version>
     </dependency>
     <dependency>
       <groupId>com.google.crypto.tink</groupId>