use consistent case for argument names of IFS function

Change-Id: I19480507e90df46deee15a6a4e80b0fcd6a9c70d
Reviewed-on: https://gerrit.libreoffice.org/25254Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>

sc/source/ui/src/scfuncs.src

@@ -11608,7 +11608,7 @@ Resource RID_SC_FUNCTION_DESCRIPTIONS2
         };
         String 2 // Name of Parameter 1
         {
-            Text [ en-US ] = "Test" ;
+            Text [ en-US ] = "test" ;
         };
         String 3 // Description of Parameter 1
         {