Fix raw-data/FASTQ README.md formatting

[lcolladotor]

README.md files at raw-data/FASTQ subdirectories don't seem to be well formatted.

Check https://github.com/LieberInstitute/spatial_hpc/tree/main/raw-data/FASTQ/2022-04-12_SPag033122, https://github.com/LieberInstitute/spatial_hpc/tree/main/raw-data/FASTQ/2022-10-12_MiSeq_SCP_visium, https://github.com/LieberInstitute/spatial_hpc/tree/main/raw-data/FASTQ/2022-10-17_SPag100722 for examples that need to be updated. See https://github.com/LieberInstitute/spatial_hpc/tree/main/raw-data/FASTQ/MiSeq for an example of one that is correctly formatted.