Skip npm ci call in dependabot bundler job

[JC-DSIT]

Proposed changes

What changed

This is a small change to allow the dependabot job to run against the bundler

if ENV["DEPENDABOT_JOB"] == "true" # dependabot will only evaluate the bundler, and will not allow npm
  warn "Skipping npm ci due to DEPENDABOT_JOB=true"
else
  system("npm ci")
  abort "npm ci failed" unless $CHILD_STATUS.success?
end

Related issue or tracking reference

You should have an open GitHub issue that this PR will fix.

• Fixes #

Checklist

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• the pull request has a clear title with a short description about the update in the documentation
• GitHub actions all pass
• you have tested the changes with a fresh build against the latest version of the tech-docs-gem
• you have linked this PR to an issue (or explained why none exists)
• you have updated documentation if needed