Update discord link in docs (solana-labs#30670)

Update discord link

docs/src/running-validator/validator-troubleshoot.md

@@ -3,7 +3,7 @@ title: Troubleshooting
 ---
 
 There is a **\#validator-support** Discord channel available to reach other
-testnet participants, [https://discord.gg/pquxPsq](https://discord.gg/pquxPsq).
+testnet participants, [https://solana.com/discord](https://solana.com/discord)
 
 ## Useful Links & Discussion
 
@@ -14,8 +14,6 @@ testnet participants, [https://discord.gg/pquxPsq](https://discord.gg/pquxPsq).
   - [\#testnet-announcements](https://discord.gg/Q5TxEC) The single source of truth for critical information relating Testnet
 - [Core software repo](https://github.com/solana-labs/solana)
 
-Can't find what you're looking for? Send an email to [email protected] or reach out to @rshea\#2622 on Discord.
-
 ## Blockstore
 
 The validator blockstore rocksdb database can be inspected using the `ldb` tool.