Merge #20848: Add gitian PGP key for theStack

729e1d1 Add gitian PGP key for theStack (Sebastian Falbesoner)

Pull request description:

  As requested per bitcoin-core/gitian.sigs#1427 (comment) 🔑
  (my key is published at https://keybase.io/thestack / https://gist.github.com/theStack/60ed7ccc7c0caffeef2d001b8b54148b)

ACKs for top commit:
  laanwj:
    ACK 729e1d1

Tree-SHA512: 23eb4206040fc3933fab71d4a5905adcada7bb0953fafd8e9905ea02d375d5909aeaff5782710023e72e6dceaa403a3a9c0f8246a03ee60b5ab45332ed0e9b9a

Author: fanquake

contrib/gitian-keys/keys.txt

@@ -28,6 +28,7 @@ D62A803E27E7F43486035ADBBCD04D8E9CCCAC2A Paul Rabahy
 37EC7D7B0A217CDB4B4E007E7FAB114267E4FA04 Peter Todd
 D762373D24904A3E42F33B08B9A408E71DAAC974 Pieter Wuille (Location: Leuven, Belgium)
 133EAC179436F14A5CF1B794860FEB804E669320 Pieter Wuille
+6A8F9C266528E25AEB1D7731C2371D91CB716EA7 Sebastian Falbesoner (theStack)
 A8FC55F3B04BA3146F3492E79303B33A305224CB Sebastian Kung (TheCharlatan)
 ED9BDF7AD6A55E232E84524257FF9BDBCC301009 Sjors Provoost
 9EDAFF80E080659604F4A76B2EBB056FD847F8A7 Stephan Oeste (Emzy)