Add missing test dependencies

The okhttp library now requires a Kotlin runtime for the tests.
It is added with these changes.

Signed-off-by: Karsten Schnitter <k.schnitter@sap.com>

Author: KarstenSchnitter

cf-java-logging-support-opentelemetry-agent-extension/pom.xml

@@ -76,6 +76,12 @@
             <version>2.1.8</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-stdlib</artifactId>
+            <version>1.9.23</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>