What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind bug
/kind cleanup
/kind deprecation
/kind design
/kind documentation

/kind feature

/kind release

What this PR does / why we need it:

• Sanitize user specified regex substitution patterns (Fix code scanning alert - Regular expression injection #66)
• Add K8s compatibility matrix (Add K8s Version Compatibility Matrix to README #62)
• Push images to ghcr.io in addition to DockerHub (Push Images to multiple registries #63)
• Bump CodeQL to v2 (Bump code-ql action to v2 #72)

Which issue(s) this PR fixes:

Fixes #66
Fixes #62
Fixes #63
Fixes #72

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Additional documentation e.g., usage docs, etc.: