documentation sometimes uses attributes, sometimes annotations - should probably only use attributes now

[AndreasA]

I noticed upon browsing the documentation that although it mostly now uses attributes, some still mention annotations like https://developer.shopware.com/docs/guides/plugins/plugins/content/seo/add-custom-seo-url.html#example-controller

[Isengo1989]

@AndreasA thank you for the hint 👍

@shyim I saw you applied the changes from annotations to attributes with rector rules. Is this already rolled out for the whole project? If so we would apply it to >= 6.5

[shyim]

we don't have any annotations anymore in 6.6. we don't support annotations even anymore

[Isengo1989]

Closed with #1238