kartverket/github-workflows's run-terraform allows for RCE via terraform plan

kartverket/github-workflows are shared reusable workflows for GitHub Actions. Prior to version 2.7.5, all users of the `run-terraform` reusable workflow from the kartverket/github-workflows repo are affected by a code injection vulnerability. A malicious actor could potentially send a PR with a malicious payload leading to execution of arbitrary JavaScript code in the context of the workflow. Users should upgrade to at least version 2.7.5 to resolve the issue. As a workaround, review any pull requests from external users for malicious payloads before allowing them to trigger a build.