Integration tests are failing with master of server

[nickvergessen]

Ref nextcloud/server#31431 (comment)

Failed scenarios

/drone/server/apps/spreed/tests/integration/features/chat/mentions.feature:255
/drone/server/apps/spreed/tests/integration/features/chat/mentions.feature:321
/drone/server/apps/spreed/tests/integration/features/chat/mentions.feature:333
/drone/server/apps/spreed/tests/integration/features/chat/mentions.feature:349
/drone/server/apps/spreed/tests/integration/features/chat/mentions.feature:403
/drone/server/apps/spreed/tests/integration/features/chat/mentions.feature:490

[nickvergessen]

Fixed with nextcloud/server#31598