Update nextflow.config with missing {

[milnus]

Missing { leading to error in nextflow config

Proposed changes in this pull request

• Bug 🐛
• Add tests ✅
• Documentation or notebook change 📝
• Removed code or file 🔥
• Dependency downgrade ⬇️
• Dependency upgrade ⬆️
• Enhancement 🎨

This fixes or addresses the following GitHub issues:

• Ref: None

Description of the Pull Request (PR):

Tried to run nextflow config using the provided nextflow.config file. This resulted in an error caused by a missing {

Checkoff for all PRs:

• I have read the Guidelines for Contributing, and this PR conforms to the stated requirements.
• I have tested this PR locally with a python tests/run_tests.py
• I have added myself as a contributor to the contributors's file
• This PR is ready for review and/or merge

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[bneron]

Thank's for the bug report and PR