chore(deps): update dependency markdown-link-check to v3.8.4

Author: renovate-bot

package-lock.json

@@ -66,7 +66,7 @@
     "cypress": "6.0.1",
     "express": "4.17.1",
     "lodash": "4.17.20",
-    "markdown-link-check": "3.8.3",
+    "markdown-link-check": "3.8.4",
     "parcel-bundler": "1.12.4",
     "prettier": "1.19.1",
     "semantic-release": "17.3.0",