docs: fix CPER spec link in cper-records

The CPER spec link was pointing to ARM SBMR docs instead of the correct
UEFI CPER specification.

Fixes: CPER Specification wrong link in cper-records #90
Tested: Verified link resolves correctly in browser.

Change-Id: Ib312bbd40190e795d877a91a24f85c8e4e088da8
Signed-off-by: Nellore Harikrishna <nharikrishna6231@gmail.com>
Signed-off-by: Ed Tanous <etanous@nvidia.com>
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>