version the brain models

right now we are showing a model's latest version in terms of the brain commitments (e.g. visual degrees, layer-to-region). Since the default commitments (i.e. github.com/brain-score/model-tools) change every now and then, we should make it clear which version of a model the website is showing, like we do for the benchmarks.
We could put a small box `brain 1.0` or so behind it to show the version

Start by tracing where the website displays a model's latest version and compare it with the existing benchmark version display. Identify how the default brain commitments from model-tools are represented, then verify that the model view clearly labels the commitments version, such as with a “brain 1.0” box.

Written by the indexing model from the issue text.