Documentation updates

The following table tracks changes to the documentation set following the release of Amster 7.2:

Documentation change log
Date	Description
2023-03-25	Release of Amster 7.2.1.
2022-10-06	Clarified the `--realms` option of the export-config command. Documented a limitation related to bulk import to external application stores with affinity. Added a workaround for a problem with `amster` running multi-line commands (OPENAM-18715)
2022/06/30	Release of Amster 7.2.0.