Update RELEASING.md

Author: JustinDSN

RELEASING.md

@@ -9,7 +9,7 @@
 account is a contributor for all pods. If you need to be added as a
 contributor, please [open a ticket requesting access](https://github.com/square/workflow-swift/issues/new).
 
-For Square's, membership is manged through the `Workflow Swift Owners` registry group. Please request access to that group through Registry. Once you have access, you can register a session with `pod trunk` using the group e-mail alias `workflow-swift-owners@squareup.com`.
+For Squares, membership is managed through the `Workflow Swift Owners` registry group. Please request access to that group through Registry. Once you have access, you can register a session with `pod trunk` using the group e-mail alias `workflow-swift-owners@squareup.com`.
 
 `pod trunk register workflow-swift-owners@squareup.com 'Workflow Swift Owners' --description='Your computer description'`