Update billing.md (#2593)

Removes 'to' in the intro sentence of the billing page:

Elastic charges a recurring fee for using our offerings on Elastic
Cloud. In this section, you'll learn how ~to~ about the dimensions used
to calculate your bill, how to monitor account usage, how to manage
billing, and more.

Link:
[https://www.elastic.co/docs/deploy-manage/cloud-organization/billing](https://www.elastic.co/docs/deploy-manage/cloud-organization/billing)

---------

Co-authored-by: David Kilfoyle <[email protected]>

Author: mdefazio

deploy-manage/cloud-organization/billing.md

@@ -14,7 +14,7 @@ products:
 
 # Billing
 
-Elastic charges a recurring fee for using our offerings on {{ecloud}}. In this section, you'll learn how to about the dimensions used to calculate your bill, how to monitor account usage, how to manage billing, and more.
+Elastic charges a recurring fee for using our offerings on {{ecloud}}. In this section, you'll learn about the dimensions used to calculate your bill, how to monitor account usage, how to manage billing, and more.
 
 ## Pricing model