fix typo

core/pax-exam-invoker-jaxrs2/src/main/java/org/ops4j/pax/exam/jaxrs2/invoker/JaxRs2ProbeInvoker.java

@@ -99,7 +99,7 @@ private boolean findAndInvoke(Class<?> testClass, Object... args) {
  // find matching method
  for (Method m : testClass.getMethods()) {
  if (m.getName().equals(method)) {
- // we assume its correct:
+ // we assume it's correct:
  invokeViaServletBridge(testClass, m, index);
  return true;
  }