Google Search Console complains about Invalid XML Tag

[tkoenig]

I guess since #19 was merged google search console complains about an invalid XML tag (see attached screenshot)

[SF5]

Thanks for the gem. The issue hasn't been resolved though:
I had to remove
<rs:md capability="resourcelist" at="2019-03-27T10:24:21+01:00"/>
rs:ln
to appease Google and there was no closing tag for rs:ln