Add mrtrix3 to environment.

Author: tsalo

env.yml

@@ -2,6 +2,7 @@ name: fmriprep
 channels:
   - https://fsl.fmrib.ox.ac.uk/fsldownloads/fslconda/public/
   - conda-forge
+  - mrtrix3
 # Update this ~yearly; last updated Jan 2024
 dependencies:
   - python=3.11
@@ -37,6 +38,8 @@ dependencies:
   - fsl-mcflirt=2111.0
   - fsl-miscmaths=2203.2
   - fsl-topup=2203.5
+  # Workflow dependencies: mrtrix3
+  - mrtrix3=3.0.4
   - pip
   - pip:
     - -r requirements.txt