fix rendering issue

Author: Blargian

docs/cloud/manage/billing.md

@@ -223,7 +223,7 @@ ClickHouse Cloud supports the following billing options:
 - Direct-sales annual / multi-year (through pre-paid "ClickHouse Credits", in USD, with additional payment options).
 - Through the AWS, GCP, and Azure marketplaces (either pay-as-you-go (PAYG) or commit to a contract with ClickHouse Cloud through the marketplace).
 
-Note: ClickHouse Cloud Credits for PAYG are invoiced in $0.01 units, allowing us to charge customers for partial ClickHouse credits based on their usage. This differs from committed spend ClickHouse credits, which are purchased in advance in whole $1 units.
+Note: ClickHouse Cloud Credits for PAYG are invoiced in \$0.01 units, allowing us to charge customers for partial ClickHouse credits based on their usage. This differs from committed spend ClickHouse credits, which are purchased in advance in whole $1 units.
 
 ### How long is the billing cycle? {#how-long-is-the-billing-cycle}