fix(github-release): update k0sproject/k0s to v1.28.6+k0s.0 (#1237)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

bootstrap/templates/kubernetes/k0s/k0sctl.yaml.j2

@@ -44,7 +44,7 @@ spec:
     #% endif %#
   k0s:
     # renovate: datasource=github-releases depName=k0sproject/k0s
-    version: "v1.28.5+k0s.0"
+    version: "v1.28.6+k0s.0"
     dynamicConfig: false
     config:
       spec: