[DOCS] Fix indentation for widgets example

The WidgetRegistration.rst had a wrong indentation inside the example.

Resolves: #104829
Releases: main
Change-Id: Ia4e4e02bba65d036363dfea3fb391c16b1fd1749
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/85896


Tested-by: Chris Müller <typo3@brotkrueml.dev>
Tested-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Chris Müller <typo3@brotkrueml.dev>
Reviewed-by: Garvin Hicking <gh@faktor-e.de>

typo3/sysext/dashboard/Documentation/Configuration/WidgetRegistration.rst

@@ -57,7 +57,7 @@ the following service registration can be used:
         arguments:
           $buttonProvider: '@dashboard.buttons.t3news'
           $options:
-          feedUrl: 'https://www.typo3.org/rss'
+            feedUrl: 'https://www.typo3.org/rss'
         tags:
           - name: dashboard.widget
             identifier: 't3news'