Changed headline

Closes #1916 (closed)

What does this MR do?

Removes the {group} placeholder in the headline of group applications.

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

100%

Links to related issues

https://yunity.slack.com/archives/C74JC2V26/p1711527931091099

How to test

1. Checkout branch locally
2. Login as foodsaver
3. Apply for a group like "Schnippelparty Göttingen"
4. Login as Bot
5. Go to the working group and open the application
6. In the headline the plaeholder should be removed and show "Bewerbung für Schnippelparty Göttingen von ..."

Screenshots (if applicable)

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• set a "for:" label to indicate who will be affected by this change
• set the "API change" label if changes in the API are not backward compatible
• added to the next milestone (see https://gitlab.com/foodsharing-dev/foodsharing/-/milestones, unless it has a "for:Dev" label)
• added an entry to CHANGELOG.md
• added a short text in the release notes to /release-notes/YYYY-MM.md
• Once your MR has been merged, you are responsible to create a testing issue in the Beta Testing forum: https://foodsharing.de/region?bid=734&sub=forum. Please change the MRs label to "state:Beta testing".
  • Consider writing a detailed description in German.
  • Describe in a few sentences, what should be tested from a user perspective.
  • Also mention different settings (e.g. different browsers, roles, ...) how this change can be tested.
  • Be aware, that also non technical people should understand.