Fix more broken links

Author: kenrogers

docs/intro.mdx

@@ -19,7 +19,7 @@ If you see something you think you might want to contribute, [please do so](/doc
 
 Looking to understand how to build full-stack dapps on Stacks? These tutorials will give you a solid introduction. At the moment we have an intro tutorial and a collection of community-created tutorials, with a comprehensive deep-dive tutorial covering BTC integration on the way.
 
-[View Hello Stacks Tutorial](/docs/developer-quickstart)
+[View Hello Stacks Tutorial](/docs/tutorials/hello-stacks)
 
 ## Stacks Academy
 
@@ -33,11 +33,11 @@ Clarity is the language that powers smart contracts built on Stacks. You'll be i
 
 [View Clarity Reference](/docs/clarity)
 
-## Nodes and Mining
+## Nodes and Miners
 
 Interested in mining or running a Stacks node? This section is where you'll learn what that looks like and how to set it up.
 
-[View Nodes and Mining](/docs/nodes-and-mining)
+[View Nodes and Miners](/docs/nodes-and-miners)
 
 ## Gaia