Sector costs hotfix

[trevorb1]

Changes proposed in this Pull Request

Corrects small bug that was introduced while converting sector files to be ruff compliant in PR #537

Checklist

• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in all of config.default.yaml.
• Changes in configuration options are also documented in doc/configtables/*.csv.