Update README.md file content and change according to "README.md template"

I added a few whitespaces according to the rules on the Drupal README.md documentation page.
Please review again.
Kind regards.

Just a minor adjustment, tightening the "Link checker summary mail" tip sentence.

Hi ressa

I reviewed MR!35 and noticed that there is missing 1 maintainer on README.md which is - Vladimir Roudakov - [VladimirAus](https://www.drupal.org/u/vladimiraus) . And I don't know if this is valid but is it better to add separate spacing for this text in the "Requirements" section for better readability This module requires the following modules:

I reviewed in this link

Thank you.

Thanks @kenyoOwen, great points. Do you feel like taking care of them?

You should be able to update the MR and then open and edit the merge request as documented in Editing a merge request → .

You may need to click the "Get push access" button first, right after the "Issue fork linkchecker-3396924" text.

Added the missing maintainer and spacing in the "Requirements" section.