Fix typo

Change-Id: Iac448f27693b428011074c83af7c2164bc0d1a31
Reviewed-on: https://gerrit.libreoffice.org/73233
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

filter/source/xslt/export/spreadsheetml/formular.xsl

@@ -200,7 +200,7 @@
     </xsl:template>
 
     <!-- Each parameter of the argumentlist have to be determined.
-    Due to the low level string functionlity in XSLT it becomes a clumsy task -->
+    Due to the low level string functionality in XSLT it becomes a clumsy task -->
     <xsl:template name="find-parameters">
         <!-- used for mapping of row/column reference  -->
         <xsl:param name="rowPos" /> <!-- the position in row (vertical of cell) -->