Update user.go

Co-authored-by: Brandon Croft <[email protected]>

Author: mfhodges

user.go

@@ -37,6 +37,8 @@ type User struct {
 	UnconfirmedEmail string           `jsonapi:"attr,unconfirmed-email"`
 	Username         string           `jsonapi:"attr,username"`
 	V2Only           bool             `jsonapi:"attr,v2-only"`
+	// Deprecated: IsSiteAdmin was deprecated in v202406 and will be removed in a future version of Terraform Enterprise
+	IsSiteAdmin      *bool            `jsonapi:"attr,is-site-admin"`
 	IsAdmin          *bool            `jsonapi:"attr,is-admin"`
 	IsSsoLogin       *bool            `jsonapi:"attr,is-sso-login"`
 	Permissions      *UserPermissions `jsonapi:"attr,permissions"`