Merge #821: Suggest keys.openpgp.org as keyserver

d1492b6 Suggest `keys.openpgp.org` as keyserver (Tim Ruffing)

Pull request description:

  See bitcoin/bitcoin#23466

ACKs for top commit:
  Zero-1729:
    ACK d1492b6

Tree-SHA512: c40201aad0bd49ada9dc2dbded6f8f75944f6951e5ea71068cf4e3a175ce1778869b8acd99c39c69312f023878979366cdf7653d22babc0f5c7c3d7d0c265672

Author: harding

_config.yml

@@ -101,4 +101,4 @@ collections:
     output: true
 
 strings:
-  gpg_keyserver: " --keyserver hkp://keyserver.ubuntu.com"  ## Prefix with a space
+  gpg_keyserver: " --keyserver hkps://keys.openpgp.org"  ## Prefix with a space