Install MAAS in charm-deployment-guide inconsistency in docs

[Charles W]

This bug tracker is for errors with the documentation, use the following as a template and remove or add fields as you see fit. Convert [ ] into [x] to check boxes:

- [X] This doc is inaccurate in this way: The system requirements at the top of the doc say you need to provision 4 Nodes with the reuirement of 4 x cloud nodes: 8GiB RAM, 2 CPUs, 1 NIC, 2 x 80GiB storage

Then at the bottom of the document it indicates that these machines need 3 drives, further deployment instructions assume you provisioned 3 drives. So the table at the bottom of the document is correct.

Node name Tag(s) CPUs NICs RAM Disks Storage
node1.maas compute 2 1 8.0 3 80.0
node2.maas compute 2 1 8.0 3 80.0
node3.maas compute 2 1 8.0 3 80.0
node4.maas compute 2 1 8.0 3 80.0
controller.maas juju 2 1 4.0 1 40.0

- [ ] This is a doc addition request.
- [ ] I have a fix to the document that I can paste below including example: input and output.

If you have a troubleshooting or support issue, use the following resources:

 - The mailing list: https://lists.openstack.org
 - IRC: 'openstack' channel on OFTC

-----------------------------------
Release: on 2023-12-05 16:11:49
SHA: 47d65269e2fabc41f5672f672d71582b36f6c60d
Source: https://opendev.org/openstack/charm-deployment-guide/src/deploy-guide/source/install-maas.rst
URL: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/2023.2/install-maas.html