tools: fix release script sign function
I forgot one scp
command in the previous fix (https://github.com/nodejs/node/pull/36540), this PR is fixing that.
@BethGriggs Apologies for breaking your release flow twice in a row, I really hope this time's the last one
Refs: https://github.com/nodejs/node/pull/36540#issuecomment-747777947
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines