Ref 2020-A not compatible with cellrangers < 4.0.0

Summary

Selecting 2020-A references with cellranger version < 4.0.0 leads to a ref not found error. THIS IS A PIPELINE ERROR, NOT COMPATIBLITY WITH CELLRANGER

Users need to be able to use 2020-A refs with cellranger < 4.0.0

Steps to reproduce

Observed bug behavior

Expected behavior

Relevant logs and/or screenshots

Potential fixes

/cc @ghenry