Fix: link fixes and fresh pr

tutorials/1-installable-code.md

@@ -1,8 +1,8 @@
 # Make your Python code installable
 
 :::{admonition} What we previously covered
-[In the previous lesson](tutorials/intro.html), you learned about what a Python package is. You also learned about the [benefits of creating a Python
-package](tutorials/intro.html#why-create-a-python-package).
+[In the previous lesson](intro), you learned about what a Python package is. You also learned about the [benefits of creating a Python
+package](package-benefits).
 :::
 
 Your next step in our packaging tutorial series is

tutorials/intro.md

@@ -79,6 +79,7 @@ Installing a package into an environment makes it easier
 to manage and reuse your code across different projects.
 Structuring your code as a package is the first step you need to take so you can share the tools in the toolbox you've created and let others build with it.
 
+(package-benefits)=
 ## Why create a Python package?
 
 You might create a Python package because you want to: