Run WCAG checks op /blog

Part of #333

Author: TimvdLippe

package.json

@@ -15,7 +15,7 @@
     "write-translations": "docusaurus write-translations",
     "write-heading-ids": "docusaurus write-heading-ids",
     "lint:typecheck": "tsc --noEmit",
-    "lint:wcag": "axe http://localhost:3000/index.html --exit --tags wcag2aa",
+    "lint:wcag": "axe http://localhost:3000/index.html http://localhost:3000/blog --exit --tags wcag2aa",
     "lint": "npm-run-all lint:*"
   },
   "dependencies": {