fix bug

src/pages/PublicNotice/ApplyForm/PublicNoticeApplyForm.js

@@ -98,10 +98,10 @@ const PublicNoticeApplyForm = ({loadedData, selections}) => {
     const readFile=(event)=>{
         let file = event.target.files[0];
         if(file){
-            if(file.name.substr(file.name.length - 4).includes(".doc")
-            || file.name.substr(file.name.length - 5).includes(".docx")
-            || file.name.substr(file.name.length - 4).includes(".xls")
-            || file.name.substr(file.name.length - 5).includes(".xlsx")
+            if(file.name.toLowerCase().substr(file.name.length - 4).includes(".doc")
+            || file.name.toLowerCase().substr(file.name.length - 5).includes(".docx")
+            || file.name.toLowerCase().substr(file.name.length - 4).includes(".xls")
+            || file.name.toLowerCase().substr(file.name.length - 5).includes(".xlsx")
             ){
                 setAttachment(event.target.files[0]);
             }else{