Updating Main from v1.0 to v1.1 (#379)

Updating v1.0 approved WG changes to v1.1
1.0-comparison...1.1-comparison

SCI aligning with ISO v1.0 approved changes (#377)

* Update Software_Carbon_Intensity_Specification.md

Signed-off-by: Sean Mcilroy <smcilroy@linuxfoundation.org>

* Update Software_Carbon_Intensity_Specification.md

Signed-off-by: Sean Mcilroy <smcilroy@linuxfoundation.org>

---------

Signed-off-by: Sean Mcilroy <smcilroy@linuxfoundation.org>