📝 Updated test_containers README for Mac and SP1

Author: robmcdougall

rest-services/test_containers/ReadMe.md

@@ -4,7 +4,7 @@ In order to create an integration test container image, using the `ff_it_test` d
 (This step is required because the .jar is not stored in the GitHub repository but it is required in order for the dockerfile to run.)
 2. Alter the first line of the `ff_it_test.dockerfile` file to use the desired AEM base container image.
 3. If using the AEM LTS, alter the `ff_it_test.dockerfile` CMD line (at the end of the file) to launch the correct crx quickstart jar (e.g. `crx-quickstart/app/cq-quickstart-6.6.1-standalone-quickstart.jar` for 6.5 LTS SP1.
-3. Run `docker buildx build --file ff_it_test.dockerfile -t aem_lts_it_tests:aem65lts_it_tests .` to create the integration test image.
+3. Run `docker buildx build --file ff_it_test.dockerfile -t aem_lts_it_tests:aem65lts_sp1_it_tests .` to create the integration test image.
 
 After performing these steps then the integration tests should run successfully after `TestUtils.java` is modified to set 
 `AEM_TARGET_TYPE` to be `AemTargetType.TESTCONTAINERS`.  If the name of the integration test container image is