Fix typo

Change-Id: Id76063b32ba37d42608cf7a19cbdf53d46fcbcc4
Reviewed-on: https://gerrit.libreoffice.org/63035
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

vcl/qa/cppunit/FontFeatureTest.cxx

@@ -87,7 +87,7 @@ void FontFeatureTest::testGetFontFeatures()
 
     // Check C2SC feature
     {
-        // periodically fails on the Windows tb72 tinderboxen with
+        // periodically fails on the Windows tb72 tinderbox with
         // equality assertion failed
         //- Expected: 1664250723
         //- Actual  : 1684826471