Merge #1029

1029: Corrected 'adminitration' to 'administration' r=mergify[bot] a=warsix4

## What type of PR?

documentation/bug-fix

## What does this PR do?

'adminitration' has been corrected to 'administration'

### Related issue(s)


## Prerequistes
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [ ] In case of feature or enhancement: documentation updated accordingly
- [ ] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/guide.html#changelog) entry file.


Co-authored-by: Cody Warmbo <github@warmbo.com>

docs/index.rst

@@ -25,7 +25,7 @@ Main features include:
 
 - **Standard email server**, IMAP and IMAP+, SMTP and Submission
 - **Advanced email features**, aliases, domain aliases, custom routing
-- **Web access**, multiple Webmails and adminitration interface
+- **Web access**, multiple Webmails and administration interface
 - **User features**, aliases, auto-reply, auto-forward, fetched accounts
 - **Admin features**, global admins, announcements, per-domain delegation, quotas
 - **Security**, enforced TLS, Letsencrypt!, outgoing DKIM, anti-virus scanner