Fix link

Author: thecrypticace

src/pages/docs/v4-beta.mdx

@@ -371,7 +371,7 @@ For most projects, the upgrade tool will automate the entire migration process i
 
 **We recommend running the upgrade tool in a new branch**, then carefully reviewing the diff and testing your project in the browser to make sure all of the changes look correct. You may need to tweak a few things by hand in complex projects, but the tool will save you a ton of time either way.
 
-It's also a good idea to go over all of the [breaking changes](#breaking-changes) in v4.0 and get a good understanding of what's changed, in case there are other things you need to update in your project that the upgrade tool doesn't catch.
+It's also a good idea to go over all of the [breaking changes](#changes-from-v3) in v4.0 and get a good understanding of what's changed, in case there are other things you need to update in your project that the upgrade tool doesn't catch.
 
 
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