fix: insecure algorithm SHA1-RSA

[zsnmwy]

Ref:
gocrane/crane#349
gocrane/crane#345 (comment)

---

Works fine in the latest k8s version.

$ kubectl get nodes -owide
NAME                   STATUS   ROLES           AGE    VERSION   INTERNAL-IP     EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION      CONTAINER-RUNTIME
ubuntu-192-168-1-130   Ready    <none>          130m   v1.24.2   192.168.1.130   <none>        Ubuntu 20.04.4 LTS   5.4.0-120-generic   containerd://1.6.6
ubuntu-192-168-1-208   Ready    control-plane   131m   v1.24.2   192.168.1.208   <none>        Ubuntu 20.04.4 LTS   5.4.0-120-generic   containerd://1.6.6

$ kubectl get pod -owide -n crane-system 
NAME                             READY   STATUS    RESTARTS   AGE   IP            NODE                   NOMINATED NODE   READINESS GATES
crane-agent-frvw2                1/1     Running   0          28m   10.10.176.3   ubuntu-192-168-1-208   <none>           <none>
crane-agent-mv2db                1/1     Running   0          28m   10.10.95.76   ubuntu-192-168-1-130   <none>           <none>
craned-8c647f8c4-lk2w7           2/2     Running   0          28m   10.10.95.78   ubuntu-192-168-1-130   <none>           <none>
fadvisor-5dc759fc9b-5b9wm        1/1     Running   0          28m   10.10.95.79   ubuntu-192-168-1-130   <none>           <none>
metric-adapter-5844dfd94-dr6p7   1/1     Running   0          28m   10.10.95.77   ubuntu-192-168-1-130   <none>           <none>