Update default-billing-currency.mdx

Update to fix order of setup

Author: clairekinde11

src/content/docs/billing/get-started/default-billing-currency.mdx

@@ -1,17 +1,23 @@
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 page_id: 7e1082b4-2b78-4e76-92fd-ee25497a4e2b
-title: Step 2 Set default billing currency
+title: Step 3 Set default billing currency
 sidebar:
-  order: 3
+  order: 4
 relatedArticles:
   - 2aa551b8-06c0-4947-bd4b-d643c77ed224
   - e6dde80d-2977-419f-a05a-62ad0a7ac6de
 ---
 
 You need to set a default billing currency for all your Kinde plans, before you create them. The currency you select cannot be changed after your first plan is published. For now, the default billing currency will be used in all plans and plan groups you create. 
 
+<Aside>
+
+If you have already created a plan and assigned a default currency that way, you may not need to change anything here.
+
+</Aside>
+
 1. Go to **Settings > Environment > Billing**.
 2. Select a default currency.
 3. Select **Save**.
 
-Next: [Step 3 Connect to Stripe](/billing/get-started/connect-to-stripe/)
+Next: [Step 4 Build plans](/billing/get-started/build-plans/)