This fixes the server-side translations for "activties" and e.g. the
default space description. We need to bump "leonelquinteros/gotext"
to latest master for that as even the latest release still contains
and issue that cause `go vet` to complain about non-constant
format strings.
Fixes: #2833, #2835
Go 1.24 does some stricter checks now on arguments to functions
accepting format strings.
This commit fixes a couple of "non-constant format string in call
to ..." errors when running the unit tests.
