Fix kotlin compiler warning (#11530)

instrumentation/kotlinx-coroutines/kotlinx-coroutines-flow-1.3/javaagent-kotlin/src/main/kotlin/io/opentelemetry/javaagent/instrumentation/kotlinxcoroutines/flow/FlowUtil.kt

@@ -10,7 +10,7 @@ import io.opentelemetry.instrumentation.api.instrumenter.Instrumenter
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.onCompletion
 
-fun <REQUEST, RESPONSE> onComplete(flow: Flow<*>, instrumenter: Instrumenter<REQUEST, RESPONSE>, context: Context, request: REQUEST): Flow<*> {
+fun <REQUEST, RESPONSE> onComplete(flow: Flow<*>, instrumenter: Instrumenter<REQUEST, RESPONSE>, context: Context, request: REQUEST & Any): Flow<*> {
   return flow.onCompletion { cause: Throwable? ->
     instrumenter.end(context, request, null, cause)
   }