exclude twitter hashtag link from linkchecker

it only seems to 404 for the link checker, not for humans.

.github/workflows/links.yml

@@ -1,6 +1,8 @@
 name: Check links
 
 on:
+  repository_dispatch:
+  workflow_dispatch:
   schedule:
     - cron: '42 04 * * *'
 
@@ -13,6 +15,7 @@ jobs:
       - name: Lychee Link Checker
         id: lychee
         uses: lycheeverse/lychee-action@v1.5.1
+        args: --exclude twitter\.com
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}