docs: Fix broken link (#9857)

Author: benwaffle

docs/repo-docs/getting-started/add-to-existing-repository.mdx

@@ -191,7 +191,7 @@ Turborepo optimizes your repository using information from your package manager.
 
 <Callout type="good-to-know">
   Depending on your repository, you may need to use the
-  `[dangerouslyDisablePackageManagerCheck](/repo/docs/reference/configuration#dangerouslydisablepackagemanagercheck)`
+  [`dangerouslyDisablePackageManagerCheck`](/repo/docs/reference/configuration#dangerouslydisablepackagemanagercheck)
   while migrating or in situations where you can't use the `packageManager` key
   yet.
 </Callout>