Add de Barros Damgaard citation to README

[jfy133]

Check Documentation

I have checked the following places for your error:

• nf-core website: troubleshooting
• nf-core/eager pipeline documentation
  - nf-core/eager FAQ/troubleshooting can be found here

Description of the bug

Latest patch release forgot to add de Barros Damgaard data to README (used in AWS full test).

Steps to reproduce

Steps to reproduce the behaviour:

1. Command line: nextflow run ...
2. See error: Please provide your error message

Expected behaviour

Log files

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• The command used to run the pipeline
• The .nextflow.log file
• The exact error:

System

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• OS:
• Version

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Additional context

[jfy133]

#629