[IMP] accounting: adding requested link to sales doc

[ksc-odoo]

PROJECT TASK (request): https://www.odoo.com/odoo/project.task/3974802?cids=3

-- added an anchor to a Contact Form Configuration section (in different_addresses rst) -- linked that new anchor to a 'Delivery and invoice addresses' section in an accounting doc (customer_addresses)

as requested in the linked task above 👍

[robodoo]

Pull request status dashboard.

[ksc-odoo]

Hey @samueljlieber -- since this is PURELY just the addition of an anchor, and a subsequent admonition, involving 2 separate (aforementioned docs), do you think you can give this a quick Tech Review/Merge at your earliest convenience? It was a requested addition, via the Project Task linked in the Description. Thanks!

[samueljlieber]

@ksc-odoo is this change still relevant, if so please rebase and merge :)