Update dependency @nuxtjs/mdc to ^0.20.0 (#194)

| datasource | package     | from   | to     |
| ---------- | ----------- | ------ | ------ |
| npm        | @nuxtjs/mdc | 0.19.2 | 0.20.0 |

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -17,7 +17,7 @@
     "@nuxt/fonts": "^0.12.1",
     "@nuxt/icon": "^2.2.0",
     "@nuxt/image": "^2.0.0",
-    "@nuxtjs/mdc": "^0.19.2",
+    "@nuxtjs/mdc": "^0.20.0",
     "@nuxtjs/sitemap": "^7.5.2",
     "@octokit/rest": "^22.0.1",
     "@tailwindcss/typography": "^0.5.19",