Fix typo

Change-Id: I026989d991cdc7d114e37a5eecc4b34f1926ba45
Reviewed-on: https://gerrit.libreoffice.org/73360
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

filter/source/xsltfilter/LibXSLTTransformer.hxx

@@ -80,7 +80,7 @@ namespace XSLT
     };
 
     /*
-     * LibXSLTTransformer provides an transforming pipe service to XSLTFilter.
+     * LibXSLTTransformer provides a transforming pipe service to XSLTFilter.
      *
      * It implements XActiveDataSource, XActiveDataSink and XActiveDataControl
      * to consume data. It also notifies upstream of important events such as