Fix Engage campaigns header

Author: pwseg

src/engage/campaigns/whatsapp-campaigns.md

@@ -6,7 +6,7 @@ plan: engage-premier
 > info "WhatsApp Public Beta"
 > WhatsApp as an Engage channel is in public beta.
 
-## How Engage campaigns works
+## How Engage campaigns work
 
 Twilio Engage uses Journeys to send WhatsApp, email, and SMS campaigns.  With Journeys, you add conditions and steps that trigger actions like sending a WhatsApp message.
 
@@ -54,4 +54,4 @@ Your Journey and WhatsApp campaign are now live. Users who trigger the WhatsApp
 
 WhatsApp limits the number of unique recipients that can receive your campaigns. If your Meta Business Account isn't verified, you'll begin with a messaging limit of 250 unique recipients every 24 hours.
 
-Once your Meta Business Account is verified, the number of unique recipients increases, depending on your messaging limit tier. For more information, view Meta's [messaging limits documentation](https://developers.facebook.com/docs/whatsapp/messaging-limits/){:target="_blank"}.
+Once your Meta Business Account is verified, the number of unique recipients increases, depending on your messaging limit tier. For more information, view Meta's [messaging limits documentation](https://developers.facebook.com/docs/whatsapp/messaging-limits/){:target="_blank"}.