Add .cf extension for "Properties"-language list in langs.model.xml

Fix notepad-plus-plus#17858, close notepad-plus-plus#17870

Author: pryrt

PowerEditor/src/langs.model.xml

@@ -450,7 +450,7 @@
             <Keywords name="type3"></Keywords>
             <Keywords name="type4">component description example externalhelp forwardhelpcategory forwardhelptargetname functionality inputs link notes outputs parameter remotehelprunspace role synopsis</Keywords>
         </Language>
-        <Language name="props" ext="properties conf cfg gitattributes gitconfig gitmodules editorconfig" commentLine="#"/>
+        <Language name="props" ext="properties conf cf cfg gitattributes gitconfig gitmodules editorconfig" commentLine="#"/>
         <Language name="purebasic" ext="pb" commentLine="" commentStart="" commentEnd="">
             <Keywords name="instre1">and break case continue data datasection declare declarecdll declaredll default deftype dim else elseif end enddatasection endenumeration endif endinterface endprocedure endselect endstructure endstructureunion enumeration extends fakereturn for foreach forever global gosub goto if includebinary includefile includepath interface newlist next or procedure procedurecdll proceduredll procedurereturn protected read repeat restore return select shared static step structure structureunion to until wend while xincludefile</Keywords>
             <Keywords name="instre2">compilercase compilerdefault compilerelse compilerendif compilerendselect compilerif compilerselect</Keywords>