Thanks for the change, but I believe it needs to be spelt "BSD-3-Clause" not "BSD-3-clause"

Does it really matter? https://spdx.org/spdx-license-list/matching-guidelines

1. Capitalization 4.1 Purpose: To avoid the possibility of a non-match due to lower case or upper case letters in otherwise the same words. 4.1.1 Guideline: All upper case and lower case letters should be treated as lower case letters. Templates do not include markup for this guideline.

See also https://github.com/spdx/spdx-spec/issues/6

I will update the SR if it's really needed.