Fix typo

Change-Id: Ib79782671d890100318a92bb4718e190d735e579
Reviewed-on: https://gerrit.libreoffice.org/73128
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

extensions/source/propctrlr/composeduiupdate.hxx

@@ -112,7 +112,7 @@ namespace pcr
             firing is suspended, only explicit ->fire calls trigger the notification to the
             delegator UI.
 
-            Note that calls to ->suspendAutoFire are culmulative, that is, if you make multiple calls
+            Note that calls to ->suspendAutoFire are cumulative, that is, if you make multiple calls
             they must be accompanied by an equal number of calls to ->resumeAutoFire, to enable
             auto-firing again.