[LLD] [docs] Add a release note for the SOURCE_DATE_EPOCH support#81388

tstellar merged 2 commits intollvm:release/18.xllvm/llvm-project:release/18.xfrom

mstorsjo:lld-source-date-epoch-relnotesmstorsjo/llvm-project:lld-source-date-epoch-relnotesCopy head branch name to clipboard