Release v0.3.0

What's Changed

• feat: move install of package ca-certificates to base by @dirien in #2
• disable docker login in gh action on PRs by @dergeberl in #3

Full Changelog: v0.2.0...v0.3.0

Basic container:
ghcr.io/dergeberl/multitool:0.3.0
dergeberl/multitool:0.3.0

Network container:
ghcr.io/dergeberl/multitool-net:0.3.0
dergeberl/multitool-net:0.3.0

Kubectl container
ghcr.io/dergeberl/multitool-kubectl:0.3.0
dergeberl/multitool-kubectl:0.3.0