docs: fixed old links

Author: nattb8

README.md

@@ -14,8 +14,8 @@ The Immutable SDK for Unity helps you integrate your game with Immutable Passpor
 
 # Documentation
 
-* [Immutable X](https://docs.immutable.com/docs/x/sdks/unity)
-* [Immutable zkEVM](https://docs.immutable.com/docs/zkEVM/sdks/unity)
+* [Immutable X](https://docs.immutable.com/reference/unity/)
+* [Immutable zkEVM](https://docs.immutable.com/reference/unity/)
 
 ## Sample Projects
 
@@ -65,7 +65,7 @@ Immutable X is open to all to build on, with no approvals required. If you want
 
 To get help from other developers, discuss ideas, and stay up-to-date on what's happening, become a part of our community on Discord.
 
-[Join us on Discord](https://discord.gg/TkVumkJ9D6)
+[Join us on Discord](https://discord.com/invite/Dmhp398dna)
 
 #### Still need help?
 

src/Packages/Marketplace/README.md

@@ -14,4 +14,4 @@ The Immutable SDK Marketplace package for Unity simplifies integrating marketpla
 
 ## Documentation  
 
-- [Immutable zkEVM Documentation](https://docs.immutable.com/docs/zkEVM/sdks/unity)
+- [Immutable zkEVM Documentation](https://docs.immutable.com/reference/unity/)