fix: update rpc references and add missing redirect

next.config.js

@@ -288,6 +288,11 @@ async function redirects() {
       destination: '/references/stacks-blockchain-api',
       permanent: true,
     },
+    {
+      source: '/core/smart/rpc-api',
+      destination: '/references/stacks-blockchain-api',
+      permanent: true,
+    },
     {
       source: '/common/javascript_ref.html',
       destination: 'https://blockstack.github.io/blockstack.js/',

src/pages/stacks-blockchain/running-testnet-node.md

@@ -73,7 +73,7 @@ The first time you run this, you'll see some logs indicating that the Rust code
 INFO [1588108047.585] [src/chainstate/stacks/index/marf.rs:732] First-ever block 0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206
 ```
 
-Awesome! Your node is now connected to the testnet network. Your node will receive new blocks when they are produced, and you can use your [node's RPC API](/core/smart/rpc-api) to send transactions, fetch information for contracts and accounts, and more.
+Awesome! Your node is now connected to the testnet network. Your node will receive new blocks when they are produced, and you can use your [node's RPC API](/references/stacks-blockchain-api#stacks-node-rpc-api) to send transactions, fetch information for contracts and accounts, and more.
 
 ## Step 3: Mining Stacks token