Fix docker inspect for latest runner images

[skonto]

• Fixes https://github.com/chainguard-dev/actions/issues/446

[skonto]

Interesting, this does not work on the actual runner image due to the older jq version, 1.6,. It does work on 1.7.1 locally on my machine though:

jq: error: syntax error, unexpected '[', expecting FORMAT or QQSTRING_START (Unix shell quoting issues?) at <top-level>, line 1:
.IPAM.Config.[].Subnet | select(. | test("^[0-9]+\\."))      

I will update with the command here.

[skonto]

We might want to simplify using grep -P if we assume that this will not run with Kind on Mac.

[mattmoor]

thanks @skonto !