[Approach Docs Fixes] Yacht and Nth Prime (#4236)

Fixed the ref-link in `nth-prime/.approaches/tracking/content.md` and the level-one header in `yacht/.approaches/functions/content.md`.

Author: Yrahcaz7

exercises/practice/nth-prime/.approaches/tracking/content.md

@@ -59,7 +59,6 @@ if prime_count == number:
 ```
 The else block is executed if the `for` loop completes normally - that is, without `break`ing.
 Read more on [for/else][for-else]
-~~~~
-
 
-[for-else]: https://book.pythontips.com/en/latest/for_-_else.html
+[for-else]: https://book.pythontips.com/en/latest/for_-_else.html
+~~~~

exercises/practice/yacht/.approaches/functions/content.md

@@ -1,4 +1,5 @@
-## Approach: Using Lambdas with Functions
+# Approach: Using Lambdas with Functions
+
 Each bit of functionality for each category can be encoded in an anonymous function (otherwise known as a [`lambda` expression][lambda] or lambda form), and the constant name set to that function.
 
 In `score`, we call the category (as it now points to a function) passing in `dice` as an argument.