fix plan grammar

Author: forstisabella

src/_data/products.yml

@@ -176,7 +176,7 @@ items:
 
 - product_display_name: Consent Management
   slug: consent-management
-  plan-note: "Consent Management is available to customers on the Business tier plans."
+  plan-note: "Consent Management is available to customers on the Business tier plan."
   plans:
     free: false
     team: false
@@ -185,7 +185,7 @@ items:
 
 - product_display_name: OAuth 2.0
   slug: oauth-2
-  plan-note: "OAuth 2.0 is available to customers on Business tier plans."
+  plan-note: "OAuth 2.0 is available to customers on Business tier plan."
   plans:
     free: false
     team: false