imb config: improve docs

[phue]

Just little tweaks:

• make docs look better on https://nf-co.re/configs/imb
• use github handle for contact info instead of email

---

name: New Config
about: A new cluster config

Please follow these steps before submitting your PR:

• Your PR targets the master branch
• You've included links to relevant issues, if any

Steps for adding a new config profile:

• Add your custom config file to the conf/ directory
• Add your documentation file to the docs/ directory
• Add your custom profile to the nfcore_custom.config file in the top-level directory
• Add your custom profile to the README.md file in the top-level directory
• Add your profile name to the profile: scope in .github/workflows/main.yml

[mashehu]

good to go know 👍🏻