Chore(docs): Fix bad links (#1009)

Author: davidkonigsberg

fern/products/docs/pages/component-library/custom-components/custom-react-components.mdx

@@ -9,7 +9,7 @@ You can extend Fern's built-in component library by adding your own custom React
 This allows you to create unique, interactive elements that match your documentation needs.
 
 <Note title="Defining a constant">
-  Don't use a React component to define a constant. Instead, consider using [reusable snippets](/docs/writing-content/reusable-markdown).
+  Don't use a React component to define a constant. Instead, consider using [reusable snippets](/docs/writing-content/reusable-snippets).
 </Note>
 
 ## How does it work?

fern/products/docs/pages/getting-started/how-it-works.mdx

@@ -78,7 +78,7 @@ flowchart TD
 You can update your documentation in two ways:
 
 - **Direct editing**: Open a pull request directly in the [GitHub repository that contains your docs](/learn/docs/getting-started/project-structure) (including your `docs.yml` configuration and Markdown files). 
-- **Fern Editor**: Use the [Fern Editor](/learn/docs/writing-content/visual-editor) to modify your docs without touching code. The Fern GitHub App fetches the current state from your docs repository and passes it to the Fern Editor. When you submit changes, the Fern GitHub App automatically opens a pull request for review. 
+- **Fern Editor**: Use the [Fern Editor](/learn/docs/writing-content/fern-editor) to modify your docs without touching code. The Fern GitHub App fetches the current state from your docs repository and passes it to the Fern Editor. When you submit changes, the Fern GitHub App automatically opens a pull request for review. 
 
 After the update goes through your review process, an approver can merge it.