Add fastp to container - Githubissues

This PR adds fastp to dependencies for environment.yml so the container has it

PR checklist

[x] 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/kmer-similarity branch on the nf-core/test-datasets repo
[ ] Ensure the test suite passes (nextflow run . -profile test,docker).
[ ] Make sure your code lints (nf-core lint .).
[ ] Documentation in docs is updated
[x] CHANGELOG.md is updated
[ ] README.md is updated