chore: Update builders

[kevdowney]

Is this a BUG REPORT or FEATURE REQUEST?: CHORE What happened: Seeing error for builders:

unit-test: .github#L1
The ubuntu-18.04 environment is deprecated, consider switching to ubuntu-20.04(ubuntu-latest), or ubuntu-22.04 instead. For more details see https://github.com/actions/virtual-environments/issues/6002

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• Kubernetes version:

kubectl version -o yaml

Other debugging information (if applicable):

• relevant logs:

kubectl logs <lifecycle-manager-pod>