Revert Quad9 example Minisign key

Author: jedisct1

dnscrypt-proxy/example-dnscrypt-proxy.toml

@@ -746,7 +746,7 @@ format = 'tsv'
 
   # [sources.quad9-resolvers]
   #   urls = ['https://www.quad9.net/quad9-resolvers.md']
-  #   minisign_key = 'RWTp2E4t64BrL651lEiDLNon+DqzPG4jhZ97pfdNkcq1VDdocLKvl5FW'
+  #   minisign_key = 'RWQBphd2+f6eiAqBsvDZEBXBGHQBJfeG6G+wJPPKxCZMoEQYpmoysKUN'
   #   cache_file = 'quad9-resolvers.md'
   #   prefix = 'quad9-'