Merge #1007: doc: Replace apoelstra's GPG key by jonasnick's GPG key

3b157c4 doc: Suggest keys.openpgp.org as keyserver in SECURITY.md (Tim Ruffing)
73a7472 doc: Replace apoelstra's GPG key by jonasnick's GPG key (Tim Ruffing)

Pull request description:

  I have verified the new key via other secure channels.

  This closes #1003 .

  We can skip the second commit but I expect bitcoin/bitcoin#23466 to be merged. If it won't be merged, we could still revert.

ACKs for top commit:
  sipa:
    ACK 3b157c4. I've also verified the key out of band.
  jonasnick:
    ACK 3b157c4

Tree-SHA512: 496f98121f14031bc693aa83bf208b253f79b700b4bca0b629deadc8852f76ef6d69ad90109baa771d7b9f6e4b983e4ed8dca404cf5aceffe9d520d3362b533a

Author: real-or-random

SECURITY.md

@@ -9,7 +9,7 @@ The following keys may be used to communicate sensitive information to developer
 | Name | Fingerprint |
 |------|-------------|
 | Pieter Wuille | 133E AC17 9436 F14A 5CF1  B794 860F EB80 4E66 9320 |
-| Andrew Poelstra | 699A 63EF C17A D3A9 A34C  FFC0 7AD0 A91C 40BD 0091 |
+| Jonas Nick | 36C7 1A37 C9D9 88BD E825  08D9 B1A7 0E4F 8DCD 0366 |
 | Tim Ruffing | 09E0 3F87 1092 E40E 106E  902B 33BC 86AB 80FF 5516 |
 
-You can import a key by running the following command with that individual’s fingerprint: `gpg --recv-keys "<fingerprint>"` Ensure that you put quotes around fingerprints containing spaces.
+You can import a key by running the following command with that individual’s fingerprint: `gpg --keyserver hkps://keys.openpgp.org --recv-keys "<fingerprint>"` Ensure that you put quotes around fingerprints containing spaces.