chore: use mailto: scheme for info.contact in settings (#300)

Author: cameri

resources/default-settings.yaml

@@ -3,7 +3,7 @@ info:
   name: nostream.your-domain.com
   description: A nostr relay written in Typescript.
   pubkey: replace-with-your-pubkey-in-hex
-  contact: [email protected]
+  contact: mailto:[email protected]
 payments:
   enabled: false
   processor: zebedee