Docs/update readme

[louisegrimble]

Description

made solosis README.md consistent with other pipelines (e.g. solosis/nf-otar)

Fixes #214

Type of change

• Documentation (non-breaking change that adds or improves the documentation)
• New feature (non-breaking change which adds functionality)
• Optimization (non-breaking, back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (whatever its nature)

Checklist

• All tests pass (eg. pytest)
• Pre-commit hooks run successfully (eg. pre-commit run --all-files)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.42%. Comparing base (98a0ffb) to head (9a83e6e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #216   +/-   ##
=======================================
  Coverage   63.42%   63.42%           
=======================================
  Files          28       28           
  Lines        1277     1277           
=======================================
  Hits          810      810           
  Misses        467      467           

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