Bug#1023596: bookworm: document changes in default rsyslog configuration

[Richard Lewis]

This bug is now fixed in commit 7122b30d

https://salsa.debian.org/ddp-team/release-notes/-/commit/7122b30dd1a483379759558faa720db7b570010c

(i dont know if the bug should be set closed/pending or if that happens later?)