refactor code

src/support.md

@@ -12,12 +12,14 @@
 
 ## 4.3. 일정표(Schedule)
 
+일정은 다음 표와 같다.
+
 <%
 const getIssueByNumber = (n) => it.issues.filter(x=> x.number === n)[0];
 
 const trId= (n)=>{
     const title = getIssueByNumber(n).title;
-return `(#${n}) ${title}`.replaceAll(/[^A-Za-z\s0-9]/gi,"").toLocaleLowerCase().replaceAll(" ","-");
+return it.toHeadId(`(#${n}) ${title}`);
 }
 const inTable = (arr) => {
     return arr.map(x=> `[#${x}](./specific.md#${trId(x)})`).join(', ')