fix PUT webhook permissions (#7970)

api4/webhook.go

@@ -109,7 +109,7 @@ func updateIncomingHook(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if c.Session.UserId != updatedHook.UserId && !c.App.SessionHasPermissionToTeam(c.Session, updatedHook.TeamId, model.PERMISSION_MANAGE_OTHERS_WEBHOOKS) {
+	if c.Session.UserId != oldHook.UserId && !c.App.SessionHasPermissionToTeam(c.Session, updatedHook.TeamId, model.PERMISSION_MANAGE_OTHERS_WEBHOOKS) {
 		c.LogAudit("fail - inappropriate permissions")
 		c.SetPermissionError(model.PERMISSION_MANAGE_OTHERS_WEBHOOKS)
 		return