Last minute changes to include to 2.6

[maxulysse]

nf-core/sarek pull request

Many thanks for contributing to nf-core/sarek!

Please fill in the appropriate checklist below (delete whatever is not relevant).
These are the most common things requested on pull requests (PRs).

PR checklist

• This comment contains a description of changes (with reason)
• If you've fixed a bug or added code that should be tested, add tests!
• If necessary, also make a PR on the nf-core/sarek branch on the nf-core/test-datasets repo
• Ensure the test suite passes (nextflow run . -profile test,docker).
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• Documentation in docs is updated
• CHANGELOG.md is updated
• README.md is updated

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[ggabernet]

I just don't really get why you removed the docker tag everywhere on the CI, but all the rest looks good to me.