Add migration to allow feed title to be null

[Grotax]

• Resolves: AxiosError: Request failed with status code 500 when adding https://theness.com/feed/ #2692

Summary

Allow feed title to be null in DB. Nothing we can do in the backend when there is no title.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Changelog entry added for all important changes.

[anoymouserver]

Wouldn't this cause empty entries in the sidebar for the affected feeds?
Maybe a fallback to the feeds domain would be better than allowing null in the database..

news/lib/Service/FeedServiceV2.php

Lines 245 to 247 in d45cc9f

	if (!is_null($title)) {
	$feed->setTitle($title);
	}

[Grotax]

Well I'm open for PRs regarding that, I will still merge this as this should have been done when the code started to allow null for the title and pushed it to the DB.