Update convert-user-mailbox-to-shared-mailbox.md

Fixed spelling issue.

Author: cshalda

microsoft-365/admin/email/convert-user-mailbox-to-shared-mailbox.md

@@ -48,7 +48,7 @@ When you convert a user's mailbox to a shared mailbox, all of the existing email
 
 - To put an In-Place Hold or a Litigation Hold on a shared mailbox, you must assign an Exchange Online Plan 2 license *or* an Exchange Online Plan 1 license and an Exchange Online Archiving add-on license to the shared mailbox.
 
-## Convert a private mailbox to a shared maailbox
+## Convert a private mailbox to a shared mailbox
 
 1. In the admin center, go to the **Users** \> <a href="https://go.microsoft.com/fwlink/p/?linkid=834822" target="_blank">Active users</a> page.