Fix missing space (#23325)

Author: edevil

src/content/changelog/email-routing/2025-06-30-mail-authentication.mdx

@@ -16,5 +16,5 @@ the forward action may fail due to missing authentication on the incoming email.
 
 SPAM has been a long-standing issue with email. By enforcing mail authentication, we will increase the efficiency of identifying abusive senders and blocking
 bad emails.
-If you're an email server delivering emails to large mailbox providers, it's likely you already usethese protocols; otherwise, please ensure
-you have them properly configured.
+If you're an email server delivering emails to large mailbox providers, it's likely you already use these protocols; otherwise, please ensure
+you have them properly configured.