Incorrect text on README.md

[dosumis]

Where does README.md text come from?

This is wrong: "Atlas of human primary motor cortex (M1), developed in collaboration with the BRAIN Initiative Cell Census Network (BICCN)"

This is whole brain not M1.

• Should also reference Siletti paper & include PURL for resolving taxonomy.

[hkir-dev]

Readme files updated accordingly:

• https://github.com/brain-bican/human-brain-cell-atlas_v1_neurons/blob/main/README.md
• https://github.com/brain-bican/human-brain-cell-atlas_v1_non-neuronal/blob/main/README.md