helm: Support unsupported K8s versions for now

Commit 9b01690 bumped the `kubeVersion`
in the Helm chart to K8s 1.26, which is effectively the oldest
Kubernetes version we officially supported.

However, this change now prevents the installation of Cilium against
Kubernetes versions which we don't officially support, but are still
used in CI (e.g. (ci-eks, ci-aks, ci-gke, ext-workload). To unbreak CI,
let's relax that restriction for now.

Reported-by: Marco Hofstetter <marco.hofstetter@isovalent.com>
Signed-off-by: Sebastian Wicki <sebastian@isovalent.com>

install/kubernetes/cilium/Chart.yaml

@@ -4,7 +4,7 @@ displayName: Cilium
 home: https://cilium.io/
 version: 1.16.0-dev
 appVersion: 1.16.0-dev
-kubeVersion: ">= 1.26.0-0"
+kubeVersion: ">= 1.16.0-0"
 icon: https://cdn.jsdelivr.net/gh/cilium/cilium@main/Documentation/images/logo-solo.svg
 description: eBPF-based Networking, Security, and Observability
 keywords: