Update src/handbook/development/ops/maintenance.md

Author: knolleary

src/handbook/development/ops/maintenance.md

@@ -35,7 +35,7 @@ Once the maintenance date is set, customers should be informed about the upcomin
 
 E-mail template for maintenance communication can be found in the [FlowFuse Cloud Maintenance Communication document](https://docs.google.com/document/d/1Pkd0qifjgs7xv96hfQ5OHnvX5n_WPHyA0AvPd9UUPL0). Adjust the template accordingly.
 
-The notification message should be sent to all FlowFuse Cloud Team Owners who have active instances in the FlowFuse Cloud and who are affected by the maintenance. To get the contact list, please refere to the [internal documentation](https://docs.google.com/document/d/1s0mXpuuPKl-1U-YVzoTEGBhllUd-UPJjFXTqa0O481c/#heading=h.hing87m0bsmu).
+The notification message should be sent to all FlowFuse Cloud Team Owners who have active instances in the FlowFuse Cloud and who are affected by the maintenance. To get the contact list, please refer to the [internal documentation](https://docs.google.com/document/d/1s0mXpuuPKl-1U-YVzoTEGBhllUd-UPJjFXTqa0O481c/#heading=h.hing87m0bsmu).
 
 We should sent notification at least twice - 45 days before the maintenance and a reminder one week before the maintenance day.