* update stable channel to v1.28.5+k3s1
Signed-off-by: Pedro Tashima <pedro.tashima@suse.com>

* add v1.29 channel
Signed-off-by: Pedro Tashima <pedro.tashima@suse.com>

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Signed-off-by: Pedro Tashima <pedro.tashima@suse.com>
Co-authored-by: Pedro Tashima <pedro.tashima@suse.com>