Remove dead link to Dockerfile from Nipoppy MRIQC page

docs/nipoppy/workflow/proc_pipe/mriqc.md

@@ -8,15 +8,17 @@ MRIQC processes the participants and produces image quality metrics from T1w, T2
 
 
 ### [MRIQC](https://mriqc.readthedocs.io/en/latest/)
-- Ensure you are running the appropriate MRIQC image, as provided [here](https://github.com/neurodatascience/nipoppy/blob/main/workflow/proc_pipe/mriqc/Dockerfile)
 - Use [run_mriqc.py](https://github.com/neurodatascience/nipoppy/tree/main/workflow/proc_pipe/mriqc) to run MRIQC pipeline directly or wrap the script in an SGE/Slurm script to run on cluster
 
+```bash
 python run_mriqc.py --global_config CONFIG.JSON --subject_id 001 --output_dir OUTPUT_DIR_PATH
-	- Mandatory: Pass in the absolute path to the configuration containing the MRIQC container and data directory to `global_config`
-	- Mandatory: Pass in the subject id to `participant_id`
-	- Mandatory: Pass in the subject id to `session_id`
-	- Mandatory: Pass in the absolute path to the output directory to `output_dir`
-
+```
+
+- Mandatory: Pass in the absolute path to the configuration containing the MRIQC container and data directory to `global_config`
+- Mandatory: Pass in the subject id to `participant_id`
+- Mandatory: Pass in the subject id to `session_id`
+- Mandatory: Pass in the absolute path to the output directory to `output_dir`
+
 !!! note
 	An example config is located [here](https://github.com/neurodatascience/nipoppy/blob/main/sample_global_configs.json)