doc bug 1606 - update get-started-binary (#1609) (#1909)

Closes https://hazelcast.atlassian.net/browse/DOC-545

For doc-bug 1606, update the step 5 MC start instructions to use the new
method (as documented in

https://docs.hazelcast.com/management-center/5.7/getting-started/install#binary)

---------

Co-authored-by: Amanda Lindsay <[email protected]>
Co-authored-by: Anatoly Maiegov <[email protected]>

Author: 3 people

docs/modules/getting-started/pages/get-started-binary.adoc

@@ -690,23 +690,23 @@ Mac::
 --
 [source,shell]
 ----
-management-center/bin/start.sh
+management-center/bin/hz-mc start
 ----
 --
 Linux:: 
 + 
 --
 [source,shell]
 ----
-management-center/bin/start.sh
+management-center/bin/hz-mc start
 ----
 --
 Windows:: 
 +
 --
 [source,shell]
 ----
-management-center/bin/start.bat
+management-center/bin/mc-start.cmd
 ----
 --
 ====