ci(github): ignore isolated package-lock changes in the pipeline
ci(github): ignore isolated package-lock changes in the pipeline

Package-lock.json is never updated independently from website or source code.
So a change to package-lock.json is always accompanied by other files.

Ignoring package-lock.json will also allow us to independently build the website
when there are no other code changes involved.

jan-molak/serenity-js,jan-molak/serenity-js,jan-molak/serenity-js,jan-molak/serenity-js