fix path

Author: kenkoooo

atcoder-problems-frontend/package.json

@@ -11,9 +11,9 @@
     "format": "yarn run sort-package-json && yarn run prettier && yarn run lint:fix",
     "lint": "eslint --ignore-path .gitignore \"./src/**/*.{js,jsx,ts,tsx}\"",
     "lint:fix": "yarn run lint --fix",
-    "md:serve": "mdbook serve ../guide-ja/",
-    "md:clean": "mdbook clean ../guide-ja/ -d=../atcoder-problems-frontend/build/book/",
-    "md:build": "mkdir -p build/book && yarn run md:clean && mdbook build ../guide-ja/ -d=../atcoder-problems-frontend/build/book/",
+    "md:serve": "mdbook serve ../guide/",
+    "md:clean": "mdbook clean ../guide/ -d=../atcoder-problems-frontend/build/book/",
+    "md:build": "mkdir -p build/book && yarn run md:clean && mdbook build ../guide/ -d=../atcoder-problems-frontend/build/book/",
     "prepare-ci": "rm -rf serve && mkdir serve && cp -r build serve/atcoder",
     "prettier": "prettier --write --ignore-path .gitignore \"**/*.{css,scss,html,js,json,jsx,md,ts,tsx}\"",
     "sort-package-json": "sort-package-json",
@@ -96,4 +96,4 @@
     "sort-package-json": "1.42.2",
     "typescript": "3.7.3"
   }
-}
+}