fix(mdb): fix desc (#5007)

* fix(mdb): fix desc

* fix(mdb): fix desc 2

Author: ldecarvalho-doc

pages/managed-mongodb-databases/index.mdx

@@ -10,7 +10,7 @@ content:
 <ProductHeader
    productName="Managed MongoDB®"
    productLogo="mongoDB"
-   description="Managed MongoDB® provides fully-managed databases with a MongoDB® compatible API, relying on MongoDB® and PostgreSQL as storage engines. Enjoy automatic backups, scaling, monitoring and much more."
+   description="Managed MongoDB® provides scalable, secure, and fully managed NoSQL solution based on the MongoDB® engine that allows developers to focus on building applications without the need to manage infrastructure."
    url="/managed-mongodb-databases/quickstart/"
    label="Managed MongoDB® Quickstart"
 />