fix: use slice instead of substr(deprecated)

Author: youngjae99

src/api/utils.ts

@@ -7,10 +7,10 @@ import {
 } from "./types";
 
 export const idToUuid = (path: string) =>
- `${path.substr(0, 8)}-${path.substr(8, 4)}-${path.substr(
+ `${path.slice(0, 8)}-${path.slice(8, 4)}-${path.slice(
  12,
  4
- )}-${path.substr(16, 4)}-${path.substr(20)}`;
+ )}-${path.slice(16, 4)}-${path.slice(20)}`;
 
 export const parsePageId = (id: string) => {
  if (id) {