fix links in intents-operator readme

[victor-ufg]

Description

There are a few links broken in the intents-operator configuration entry page, "Controlling access using the intents operator" section.
I am creating explicit heading ids to avoid future breaks (https://docusaurus.io/docs/next/markdown-features/toc#heading-ids)

[orishoshan]

Thanks @victor-ufg! These links are supposed to lead to the tutorials. We use a plugin called docusaurus-plugin-client-redirects to accommodate path changes, but it seems that when clicked from within Docusaurus, the redirects don't work due to client-side navigation 😱

During a recent reorganization of the docs we changed the paths and added redirects (if you click one of the broken links then refresh, you should find yourself redirected!), but looks like we do have to make sure to update all the links.

This is also supposed to be detected by the onBrokenMarkdownLinks setting in Docusaurus - I'm looking into why it allowed the build to go through despite being set to "throw"...

[orishoshan]

It was a double whammy from the redirect plugin. It makes the broken link validation not work as that works on files, but the React router which performs the client-side navigation still doesn't know about them, so returns a 404.

[orishoshan]

Fixed in #208