Install instructions for openSUSE Tumbleweed

[AlpineWeezl]

Hi team

Unfortunately, the instruction for openSUSE on Linux (RPM/DEB/APK) installer packages only works for Leap. If you try it on Tumbleweed, it can't work, because Tumbleweed uses the release date for $(. /etc/os-release; echo $VERSION_ID).
I'd suggest to put a hint for Tumbleweed to use the latest Leap version instead of the dynamic part into the instructions.

Regards
Matthias