update stable channel to v1.28.5+k3s1 and add v1.29 channel (#9110)

* 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>

---------

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

channel.yaml

@@ -1,7 +1,7 @@
 # Example channels config
 channels:
 - name: stable
-  latest: v1.28.4+k3s2
+  latest: v1.28.5+k3s1
 - name: latest
   latestRegexp: .*
   excludeRegexp: (^[^+]+-|v1\.25\.5\+k3s1|v1\.26\.0\+k3s1)
@@ -53,6 +53,9 @@ channels:
 - name: v1.28
   latestRegexp: v1\.28\..*
   excludeRegexp: ^[^+]+-
+- name: v1.29
+  latestRegexp: v1\.29\..*
+  excludeRegexp: ^[^+]+-
 github:
   owner: k3s-io
   repo: k3s