Update README

README.md

@@ -245,8 +245,8 @@ even if these machines do not share the same set of PHP extensions.
 For example, serializing on a machine with GMP support and unserializing on a machine that does not have this extension
 installed will still work as expected.
 
-### brick/math for enterprise
+## brick/math for enterprise
 
-Available as part of the Tidelift Subscription
+Available as part of the Tidelift Subscription.
 
 The maintainers of brick/math and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. [Learn more.](https://tidelift.com/subscription/pkg/packagist-brick-math?utm_source=packagist-brick-math&utm_medium=referral&utm_campaign=enterprise&utm_term=repo)