Update templates.mdx

Author: tashian

step-ca/templates.mdx

@@ -911,7 +911,7 @@ We'll need to construct some ASN.1 for this:
 First, the OID `2.5.29.32` represents the Certificate Policies extension.
 In the value for this extension, we have two policies.
 The first references Policy OID `1.3.5.7`, a custom policy OID that would be defined by the organization.
-For the second value, both a Policy OID and a CPS URI `http://example.com/cps` is provided.
+For the second policy, both a Policy OID and a CPS URI `http://example.com/cps` are provided.
 The CPS URI contains a document explaining how the CA enforces policy `1.3.6.1.5.5.7.2.1`.
 
 #### X.509 OpenVPN certificates