bump to .20 whereami

[theemadnes]

updated whereami image references to latest version.

us-docker.pkg.dev/google-samples/containers/gke/whereami:v1.2.20 does the following:

• updates Python base image to 3.11.3-slim
• removes the gRPC health check binary, which otherwise would get flagged with some critical CVEs

[boredabdel]

Hi,

I'm going on vacay for few weeks and will take a look at this when i'm back. I was to use the occassion to do some cleaup. Are you ok with waiting few weeks ?

[theemadnes]

yeah dude no rush. have fun.