Update the Helm Chart index after the 0.21.0 release (#4257)
Update the Helm Chart index after the 0.21.0 release (#4257)

Signed-off-by: Jakub Scholz <c50267b906a652f2142cfab006e215c9f6fdc8a0@scholzj.com>
ppatierno/kaas,scholzj/barnabas,scholzj/barnabas,ppatierno/kaas