Fix typo

Change-Id: I0037cf0a59189862ad502bfbdb00580ed7378fe4
Reviewed-on: https://gerrit.libreoffice.org/70393
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

chart2/source/controller/accessibility/AccessibleBase.cxx

@@ -415,7 +415,7 @@ void SAL_CALL AccessibleBase::disposing()
         MutexGuard aGuard(m_aMutex);
         OSL_ENSURE(!m_bIsDisposed, "dispose() called twice");
 
-        // notify disposing to all AccessibleEvent listeners asynchron
+        // notify disposing to all AccessibleEvent listeners asynchronous
         if (m_nEventNotifierId)
         {
             ::comphelper::AccessibleEventNotifier::revokeClientNotifyDisposing(m_nEventNotifierId,