Fixed broken link in foodbasket address warning

What does this MR do?

Fix broken link which got introduced in !1143 (merged)
I don't feel like I need a changelog entry for this.

Steps to reproduce/test

• Being on https://beta.foodsharing.de/karte
• use topbar creating a foodbasket having no address in profile
• falsely get redirected
  • to: https://beta.foodsharing.de/karte?page=settings&sub=general
  • instead of: https://beta.foodsharing.de/?page=settings&sub=general

How confident are you it won't break things if deployed?

Very

Links to related issues

• !1143 (merged)

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• joined #foodsharing-beta channel at https://slackin.yunity.org
• added an entry to CHANGELOG.md (description, merge request link, username(s))
• Once your MR has been merged, you are responsible to update the #foodsharing-beta Slack channel about what has been changed here. They will test your work in different browsers, roles or other settings