`/etc/upstream-release/lsb-release` uses os-release format instead of lsb-release format

Note: i am not sure where else to report this problem aside from here

I have noticed that elementaryOS (6.1) ships a /etc/upstream-release/lsb-release file, but that file is in os-release format instead of lsb-release format.

for example, the lsb-release format is used for /etc/lsb-release:

DISTRIB_ID=elementary
DISTRIB_RELEASE=6.1
DISTRIB_CODENAME=jolnir
DISTRIB_DESCRIPTION="elementary OS 6 Jólnir"

and the os-release format is used for /etc/os-release:

NAME="elementary OS"
VERSION="6.1 Jólnir"
ID=elementary
ID_LIKE=ubuntu
PRETTY_NAME="elementary OS 6.1 Jólnir"
LOGO=distributor-logo
VERSION_ID="6.1"
HOME_URL="https://elementary.io/"
DOCUMENTATION_URL="https://elementary.io/docs/learning-the-basics"
SUPPORT_URL="https://elementary.io/support"
BUG_REPORT_URL="https://github.com/elementary/triage/issues/new"
PRIVACY_POLICY_URL="https://elementary.io/privacy-policy"
VERSION_CODENAME=jolnir
UBUNTU_CODENAME=focal

and the current /etc/upstream-release/lsb-release file is:

ID=Ubuntu
VERSION_ID=20.04
VERSION_CODENAME=focal
PRETTY_NAME="Ubuntu 20.04.5 LTS"

originally noticed in https://github.com/nodkz/mongodb-memory-server/issues/735, where a user (probably running elementaryOS as host) has reported this, and i reproduced it in elementary/docker:fe08f970723a (docker image)

elementary / os-patches

`/etc/upstream-release/lsb-release` uses os-release format instead of lsb-release format #267