fix(geth-swap): support traefik v3 CRD api group

[gacevicljubisa]

Traefik v3 (k3s >= 1.33) removed the legacy traefik.containo.us API group,
breaking geth-swap installs with ingress.class: traefik:

no matches for kind "IngressRoute" in version "traefik.containo.us/v1alpha1"

Pick traefik.io/v1alpha1 via cluster capabilities when available, falling back
to the legacy group on older clusters. Backward compatible; chart bumped to 0.6.2.

[darkobas2]

Change itself looks good — the Capabilities.APIVersions.Has check with the legacy fallback is the right pattern.

One thing I spotted while reviewing: the same legacy API group shows up in charts/beekeeper/templates/clusterrole.yaml (~L49), which still grants RBAC on traefik.containo.us only:

- apiGroups: ["traefik.containo.us"]
  resources: ["ingresses","ingressroutes"]
  verbs: ["get", "list", "watch"]

On Traefik v3 the IngressRoutes are in traefik.io, so that ClusterRole won't cover them — this PR fixes the chart that creates the resource but not the one that reads it. Adding the new group alongside the old one would keep both working:

- apiGroups: ["traefik.containo.us", "traefik.io"]

Happy either way — folded in here or as a follow-up. (Those two files are the only hits for the legacy group in the repo.)

[darkobas2]

LGTM — the Capabilities.APIVersions.Has check with the legacy fallback is the right pattern here.

The beekeeper ClusterRole gap I raised in the comment above is being handled in a separate follow-up PR, so nothing to change here.