Update the Invite Bot to Server link/button on the Discord page.

Update the Invite Bot to Server link to point to the Hubs Discord Bot GitHub repository instead of the Mozilla Hubs team's Google form which contained outdated links, offers of support, and requests for information to be shared with the Mozilla Hubs team.

src/discord.js

@@ -13,7 +13,7 @@ import { store } from "./utils/store-instance";
 
 registerTelemetry("/discord", "Discord Landing Page");
 
-const inviteUrl = "https://forms.gle/GGPgarSuY5WaTNCT8";
+const inviteUrl = "https://github.com/Hubs-Foundation/hubs-discord-bot";
 
 class DiscordPage extends Component {
   componentDidMount() {}