[Durable Objects] Fix broken links to SQLite class creation docs.

These existing links were just broken. Though, arguably they should actually go to `/durable-objects/best-practices/access-durable-objects-storage/#sqlite-storage-backend`, perhaps? For now I just fixed the links.

Author: kentonv

src/content/docs/durable-objects/api/storage-api.mdx

@@ -247,7 +247,7 @@ The `put()` method returns a `Promise`, but most applications can discard this p
 
 :::note[SQLite in Durable Objects Beta]
 
-SQL API methods accessed with `ctx.storage.sql` are only allowed on [Durable Object classes with SQLite storage backend](/durable-objects/reference/durable-objects-migrations/#enable-sqlite-storage-backend-on-create-durable-object-class-migration) and will return an error if called on Durable Object classes with a key-value storage backend.
+SQL API methods accessed with `ctx.storage.sql` are only allowed on [Durable Object classes with SQLite storage backend](/durable-objects/reference/durable-objects-migrations/#enable-sqlite-storage-backend-on-new-durable-object-class-migration) and will return an error if called on Durable Object classes with a key-value storage backend.
 
 :::
 

src/content/partials/workers/storage_api_pricing.mdx

@@ -42,7 +42,7 @@ You can introspect rows read and rows written using `cursor.rowsRead` and `curso
 
 :::
 
-For [Durable Objects classes with SQLite storage backend](/durable-objects/reference/durable-objects-migrations/#enable-sqlite-storage-backend-on-create-durable-object-class-migration) via `ctx.storage.sql` the following pricing is used instead:
+For [Durable Objects classes with SQLite storage backend](/durable-objects/reference/durable-objects-migrations/#enable-sqlite-storage-backend-on-new-durable-object-class-migration) via `ctx.storage.sql` the following pricing is used instead:
 
 |                             | Workers Paid plan          |
 | ----------------------------| -------------------------- |