moved sso doc over to configurations

[erondpowell]

Fixes #11034

Guides had only one item, sso, which was a better fit inside of the configurations folder.

[rijkvanzanten]

We'll also have to update the objects that control the navigation, here:

directus/docs/.vuepress/config.js

Lines 477 to 486 in 154b919

	{
	title: 'Guides',
	children: [
	{
	type: 'page',
	path: '/guides/sso',
	title: 'Single Sign-On (SSO)',
	},
	],
	},

[erondpowell]

We'll also have to update the objects that control the navigation, here:

directus/docs/.vuepress/config.js

Lines 477 to 486 in 154b919

	{
	title: 'Guides',
	children: [
	{
	type: 'page',
	path: '/guides/sso',
	title: 'Single Sign-On (SSO)',
	},
	],
	},

I'm pretty sure this takes care of it. Should I close this or another member?