fix: otel test

Author: AgraVator

opentelemetry/src/test/java/io/grpc/opentelemetry/GrpcOpenTelemetryTest.java

@@ -98,6 +98,7 @@ public void buildTracer() {
     grpcOpenTelemetry.configureServerBuilder(mockServerBuiler);
     verify(mockServerBuiler, times(2)).addStreamTracerFactory(any());
     verify(mockServerBuiler).intercept(any());
+    verify(mockServerBuiler).addMetricSink(any());
     verifyNoMoreInteractions(mockServerBuiler);
 
     ManagedChannelBuilder<?> mockChannelBuilder = mock(ManagedChannelBuilder.class);