NWB version in nwb.file.yaml should be updated

[rly]

https://github.com/NeurodataWithoutBorders/nwb-schema/blob/dev/core/nwb.file.yaml#L10

The version here and in nwb.namespace.yaml should be updated to 2.2.1.

[t-b]

Isn't that version number something we would like to gather from a git tag or package version?

[rly]

@t-b how would one do that in YAML?

[oruebel]

I think doing this may require a Git workflow to automatically update the YAML files when a tag is being created.