This change aims to make documents more readable and avoid syntax errors
by adding a language specifier to code blocks in Markdown.

To perform this task efficiently, I use two remark plugins:
- [remark-lint-code-block-syntax](https://github.com/ybiquitous/remark-lint-code-block-syntax)
- [remark-lint-fenced-code-flag](https://github.com/remarkjs/remark-lint/tree/main/packages/remark-lint-fenced-code-flag)

```diff
--- a/package.json
+++ b/package.json
@@ -66,7 +66,9 @@
   },
   "remarkConfig": {
     "plugins": [
-      "@stylelint/remark-preset"
+      "@stylelint/remark-preset",
+      "remark-lint-code-block-syntax",
+      "remark-lint-fenced-code-flag"
     ]
   },
   "jest": {
@@ -189,6 +191,8 @@
     "postcss-import": "^12.0.1",
     "prettier": "^2.2.1",
     "remark-cli": "^9.0.0",
+    "remark-lint-code-block-syntax": "^0.2.1",
+    "remark-lint-fenced-code-flag": "^2.0.1",
     "typescript": "^4.2.4"
   },
   "engines": {
```

Note: I do not recommend the addition of the plugins because they produce false positives.