Bump com.squareup.okhttp3:okhttp in /tests/milvustestv2 (#1688)

Bumps [com.squareup.okhttp3:okhttp](https://github.com/square/okhttp) from 4.9.0 to 4.9.2.
- [Changelog](https://github.com/square/okhttp/blob/master/CHANGELOG.md)
- [Commits](square/okhttp@parent-4.9.0...parent-4.9.2)

---
updated-dependencies:
- dependency-name: com.squareup.okhttp3:okhttp
  dependency-version: 4.9.2
  dependency-type: direct:production
...

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tests/milvustestv2/pom.xml

@@ -90,7 +90,7 @@
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>
-            <version>4.9.0</version>
+            <version>4.9.2</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>