Update NodeHub hosting details and links (#526)

Author: aradabir007

docs/user/masternodes/hosting.rst

@@ -126,13 +126,13 @@ https://nodehub.io
 
 - Operated by: NodeHub LLC
 - Services: Hosting, Governance, Stats, Monitoring
-- Cost: $4.80/month (charged daily at $0.16)
+- Cost: $3.90/month (charged daily at $0.13)
 - Accepts DASH as payment
 - `Site <https://nodehub.io?utm_source=dashpay-docs&utm_medium=hosting-services>`__
 - `Email <hello@nodehub.io>`__
-- `Twitter <https://twitter.com/nodehubio>`__
+- `X <https://x.com/nodehubio>`__
 - `Telegram <https://t.me/nodehub>`__
-- `Discord <https://discord.nodehub.io>`__
+- `Discord <https://discord.com/invite/vvm6sem>`__
 
 
 Gentarium