Guard against error extracting `body` from URL (#20428)
Guard against error extracting `body` from URL (#20428)

If `Nokogiri::HTML(value).at_xpath('//body')` fails to find the `body` element, it will return `nil`. We can guard against that with an early return. Avoids calling `children` on `Nilclass` in those cases.
yukimochi/mastodon,im-in-space/mastodon,glitch-soc/mastodon,glitch-soc/mastodon,theoria24/mastodon,Ryanaka/mastodon,MitarashiDango/mastodon,MitarashiDango/mastodon,yukimochi/mastodon,theoria24/mastodon,gol-cha/mastodon,glitch-soc/mastodon,yukimochi/mastodon,masto-donte-com-br/mastodon,im-in-space/mastodon,MitarashiDango/mastodon,theoria24/mastodon,im-in-space/mastodon,maa123/mastodon,glitch-soc/mastodon,MitarashiDango/mastodon,gol-cha/mastodon,masto-donte-com-br/mastodon,theoria24/mastodon,masto-donte-com-br/mastodon,Ryanaka/mastodon,Ryanaka/mastodon,im-in-space/mastodon,gol-cha/mastodon,gol-cha/mastodon,maa123/mastodon,maa123/mastodon,Ryanaka/mastodon,maa123/mastodon,masto-donte-com-br/mastodon,yukimochi/mastodon