fix json imports in docs (#242)

Author: mr-zwets

website/docs/basics/getting-started.md

@@ -108,7 +108,7 @@ Now to initialise a contract we will import the `ElectrumNetworkProvider` and `C
 
 ```javascript
 import { ElectrumNetworkProvider, Contract } from 'cashscript';
-import artifact from './TransferWithTimeout.json';
+import artifact from './TransferWithTimeout.json' with { type: 'json' };
 import { alicePub, bobPub } from './keys.js';
 
 // Initialise a network provider for network operations

website/docs/sdk/instantiation.md

@@ -42,7 +42,7 @@ import { Contract, ElectrumNetworkProvider } from 'cashscript';
 import { compileFile } from 'cashc';
 
 // Import the artifact JSON
-import P2PKH from './p2pkh.json';
+import P2PKH from './p2pkh.json' with { type: 'json' };
 
 // Or compile a contract file
 const P2PKH = compileFile(new URL('p2pkh.cash', import.meta.url));