Update 01-plutus.mdx

Author: olgahryniuk

docs/developer-resources/05-smart-contracts/01-plutus.mdx

@@ -9,7 +9,7 @@ sidebar_position: 1
 To start developing with Plutus, see:
 
 - [Plutus Core documentation](https://plutus.cardano.intersectmbo.org/docs/)
-- [Developer portal Plinth overview](https://developers.cardano.org/docs/smart-contracts/smart-contract-languages/plinth)
+- [Developer portal Plinth overview](https://developers.cardano.org/docs/build/smart-contracts/languages/plinth)
 - 'Plutus resources' below for more details.
 
 :::