misc: Update the version to v21.1.0.2

Change-Id: I4013ed678b367f95bb0f69e4a827ad04995cc3c0
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/50750
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed