Fix simple onchain nfts (#745)

apps/base-docs/tutorials/docs/1_thirdweb-unreal-nft-items.md

@@ -647,4 +647,4 @@ In this tutorial, you've learned how to set up Thirdweb's engine and use it to c
 [thirdweb engine dashboard]: https://thirdweb.com/dashboard/engine
 [wallet best practices]: https://portal.thirdweb.com/engine/features/backend-wallets#best-practices
 [conversion function]: https://blueprintue.com/blueprint/vm4ujcqe/
-[Simple Onchain NFTs]: /simple-onchain-nfts
+[Simple Onchain NFTs]: /tutorials/simple-onchain-nfts

apps/base-docs/tutorials/docs/2_coinbase-smart-wallet.md

@@ -439,4 +439,4 @@ In this tutorial, you've learned how to connect users to your onchain app with t
 [Base Gasless Campaign]: https://www.smartwallet.dev/base-gasless-campaign
 [Paymaster]: https://www.smartwallet.dev/guides/paymasters
 [Project Settings]: https://portal.cdp.coinbase.com/project-settings
-[Simple Onchain NFTs]: /simple-onchain-nfts
+[Simple Onchain NFTs]: /tutorials/simple-onchain-nfts

apps/base-docs/tutorials/docs/2_simple-onchain-nfts.md

@@ -464,7 +464,7 @@ contract RandomColorNFT is ERC721 {
 }
 ```
 
-````json
+```json
 {
   "address": "0x59c35beE5eAdeEDDc2c34d419459243bD70AFD72",
   "abi": [
@@ -1068,4 +1068,3 @@ contract RandomColorNFT is ERC721 {
 [Coinbase Smart Wallet]: /coinbase-smart-wallet
 [Below]: #random-color-nft-contract
 [Complex Onchain NFTs]: /complex-onchain-nfts
-````