Add contact info string to rule book

src/main/resources/data/nucleoid_extras/lang/en_us.json

@@ -401,6 +401,7 @@
   "text.nucleoid_extras.rules.welcome": "Welcome to %s!\n\nWe're building open-source minigames.",
   "text.nucleoid_extras.rules.links": "You can find us at %s, or join our Discord at %s.",
   "text.nucleoid_extras.rules.guidelines": "We have a couple of guidelines to keep in mind while playing on the following pages.",
+  "text.nucleoid_extras.rules.contact": "If you do encounter any behavior that you would like to report, feel free to join our Discord and message @NucleMail, or send us an email at [email protected].",
   "text.nucleoid_extras.rules.friendly_environment.title": "1. A friendly environment",
   "text.nucleoid_extras.rules.friendly_environment.1": "We're all here to have fun! Let's create an inclusive environment where we all feel comfortable to play and share the joy of creating together.",
   "text.nucleoid_extras.rules.friendly_environment.2": "Treat all players, regardless of their background, with respect and kindness. Any kind of discrimination or harassment is prohibited.",