certificate signed by unknown authority

### Describe the problem
I have this error message in my log:
ERR update check failed error="Get \"https://update.argotunnel.com?arch=amd64&clientVersion=2023.6.1&os=linux\": x509: certificate signed by unknown authority"

Everything works fine, except for this error message that bothers me.
I think that if I solve this message, my tunnel should have the status 'Healthy' (because currently I am in 'Degraded').

### To Reproduce
Unraid server > Docker
Setup with this var TUNNEL_TOKEN, NO_AUTOUPDATE

### Expected behavior
Have no error message :)

### Additional context
I tried to modify several parameters (TUNNEL_ORIGIN_CERT, NO_AUTOUPDATE, etc.).
I use cloudflared to expose my websites on the internet.

Thank you in advance for your help.