Disable HTML checks temporarily

Until vuejs/vuepress#3118 is merged or otherwise fixed.

Author: niknetniko

.github/workflows/main.yml

@@ -30,5 +30,8 @@ jobs:
           max_concurrency: 3
           # This check doesn't pick up the favicon in the public folder
           check_favicon: false
+          # Until Vuepress itself doesn't include invalid CSS anymore.
+          # See https://github.com/vuejs/vuepress/pull/3118
+          check_html: false
           ignore_url_re: |
             /smartschool.be/