Lint fixes

## 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 you've added a new tool - have you followed the pipeline conventions in the [contribution docs](https://github.com/nf-core/denovotranscript/tree/master/.github/CONTRIBUTING.md) - [ ] If necessary, also make a PR on the nf-core/denovotranscript _branch_ on the [nf-core/test-datasets](https://github.com/nf-core/test-datasets) repository. - [x] Make sure your code lints (`nf-core pipelines lint`). - [ ] Ensure the test suite passes (`nextflow run . -profile test,docker --outdir <OUTDIR>`). - [ ] Check for unexpected warnings in debug mode (`nextflow run . -profile debug,test,docker --outdir <OUTDIR>`). - [ ] Usage Documentation in `docs/usage.md` is updated. - [ ] Output Documentation in `docs/output.md` is updated. - [x] `CHANGELOG.md` is updated. - [ ] `README.md` is updated (including new tool citations and authors/contributors).