Adjust sentence (SME review)

Author: pedrosousa

src/content/docs/waf/reference/legacy/old-waf-managed-rules/upgrade.mdx

@@ -9,7 +9,7 @@ import { GlossaryTooltip } from "~/components";
 
 On 2022-05-04, Cloudflare started the upgrade from the [previous version of WAF managed rules](/waf/reference/legacy/old-waf-managed-rules/) to the new [WAF Managed Rules](/waf/managed-rules/), allowing a first set of eligible zones to migrate. Currently, all zones can upgrade to WAF Managed Rules, including partner accounts.
 
-Cloudflare is gradually upgrading all rules created in the previous version of WAF managed rules. You can also start the upgrade process manually for a zone in the Cloudflare dashboard or via API. **The upgrade is irreversible** — once you upgrade to the new WAF Managed Rules, you cannot go back to using WAF managed rules.
+Cloudflare is gradually upgrading all zones to the new version of WAF Managed Rules. You can also start the upgrade process manually for a zone in the Cloudflare dashboard or via API. **The upgrade is irreversible** — once you upgrade to the new WAF Managed Rules, you cannot go back to using the previous version.
 
 Once the upgrade finishes, the **Managed rules** tab in the Cloudflare dashboard (available in **Security** > **WAF** > **Managed rules**) will display a new interface, and the WAF managed rules APIs will stop working.