Incorrect diagrams for Networking Options in Installation Guide

[Tang Chai Keong]

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 diagrams for Networking Option 1 and 2 are the same and incorrect and showing things unrelated to network service layouts.
- [ ] 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

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Release: on 2024-01-04 09:53:17
SHA: 9571f9e0b621f431f2b9d67a409a97318f87e635
Source: https://opendev.org/openstack/openstack-manuals/src/doc/install-guide/source/overview.rst
URL: https://docs.openstack.org/install-guide/overview.html