Bump com.squareup.okhttp3:okhttp in /tests/milvustest (#1675)

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](https://github.com/square/okhttp/compare/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
...

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

tests/milvustest/pom.xml

@@ -126,7 +126,7 @@
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>
-            <version>4.9.0</version>
+            <version>4.9.2</version>
         </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>