Do not HTML escape callouts in source blocks

[xcoulon]

in a doc with

[source,java]
----
@QuarkusTest
public class GreetingResourceTest {

    @InjectMock
    @RestClient // <1>
    GreetingService greetingService;

    @Test
    public void testHelloEndpoint() {
        Mockito.when(greetingService.hello()).thenReturn("hello from mockito");

        given()
          .when().get("/hello")
          .then()
             .statusCode(200)
             .body(is("hello from mockito"));
    }

}
----
<1> We need to use the @RestClient CDI qualifier, since Quarkus creates the GreetingService bean with this qualifier.

the callout is rendered as <b class="conum">(1)</b> instead of <b class="conum">(1)</b>