Update docs/source-2.0/guides/client-guidance/identity-auth/index.md

Co-authored-by: Jordon Phillips <JordonPhillips@users.noreply.github.com>

Author: lucix-aws

docs/source-2.0/guides/client-guidance/identity-auth/index.md

@@ -69,8 +69,8 @@ request**. A signature is metadata attached to a request that will be sent to
 the service in order to allow the service to authenticate the caller's identity.
 
 For example, an operation that uses a bearer token for
-identification would "sign" an outgoing HTTP request by presenting the value of
-the token in the Authorization header.
+identification would sign an outgoing HTTP request by presenting the value of
+the token in the `Authorization` header.
 
 All signers require, at a minimum, a request to sign and an identity with which
 to sign. A Signer should be modeled like so: