add beta to the docs

Author: chris-nowicki

docs/store-operations/payments/index.mdx

@@ -82,7 +82,7 @@ The following table lists the payment gateways that are compatible with our publ
 | Stripe           | ✓                     | ✓ |
 | StripeV3         | ✓                     | ✓ |
 | StripeV4         | ✓                     | ✓ |
-| Stripe OCS       | ✓                     | ✓ |
+| Stripe OCS (beta)| ✓                     | ✓ |
 | TD Online Mart   | ✓                     | ✓ |
 | USA ePay         |                             | ✓ |
 | Vantiv           |                             | ✓ |
@@ -134,6 +134,10 @@ In addition to the [prerequisites](/docs/store-operations/payments#prerequisites
 
 ### Using Stripe OCS ACH stored bank accounts
 
+<Callout type="important">
+  Stripe OCS ACH is currently in beta. Please read the following [Knowledge Base (KB) article](https://support.bigcommerce.com/s/article/Connecting-with-Stripe-OCS?language=en_US#notifications).
+</Callout>
+
 In addition to the [prerequisites](/docs/store-operations/payments#prerequisites-for-charging-stored-payment-instruments) above, to use Stripe OCS ACH in payments API, your store needs to:
 
 - Enable ACH stored credentials in BigCommerce **Control Panel** > **Settings** > **Payments** > **Stripe**. See image below for reference:
@@ -144,7 +148,6 @@ In addition to the [prerequisites](/docs/store-operations/payments#prerequisites
 
 Once the ACH checkbox is enabled and ACH is activated as a payment method on Stripe Dashboard, shoppers will be able to store their bank account details from both the "My Account" page and checkout page.
 
-
 ### Charging stored instruments
 
 There are three steps to using a stored card or PayPal account to make a payment.