Update modules/authentication/proc-reducing-token-size.adoc

Co-authored-by: Judith Magak <[email protected]>

Author: deerskindoll

modules/authentication/proc-reducing-token-size.adoc

@@ -11,7 +11,7 @@ Use the `omitIdentityTokenOwnershipClaim` flag to remove the `ent` claim from to
 [IMPORTANT]
 ====
 Without the `ent` claim in the token, consumers of the token must call the `/v1/userinfo` endpoint on the auth backend to fetch the ownership references of the user.
-However, there's usually no action required for the consumers.
+However, there is usually no action required for the consumers.
 Clients still receive the full set of claims during authentication,
 and plugin backends that use the `UserInfoService` to access the ownership references from user credentials can call the `userinfo` endpoint if necessary.
 ====