add language indicator to code blocks

package.json

@@ -86,7 +86,7 @@
     "@jakejarvis/eslint-config": "^4.0.7",
     "@tailwindcss/postcss": "^4.1.5",
     "@types/mdx": "^2.0.13",
-    "@types/node": "^22.15.14",
+    "@types/node": "^22.15.15",
     "@types/prop-types": "^15.7.14",
     "@types/react": "^19.1.3",
     "@types/react-dom": "^19.1.3",
@@ -131,7 +131,8 @@
   "pnpm": {
     "peerDependencyRules": {
       "allowedVersions": {
-        "react": "^19"
+        "react": "^19",
+        "react-dom": "^19"
       }
     }
   }