fix(ci): remove invalid --include-mail=false arg from lychee link checker

The --include-mail flag in lychee v0.23.0 does not accept a value.
Passing --include-mail=false caused lychee to exit with an error on
every run, which in turn triggered the Create Issue From File step to
open a new issue even though there were no broken links to report.

Author: mroderick

.github/workflows/link-check.yml

@@ -40,7 +40,6 @@ jobs:
           args: |
             docs/.vitepress/dist
             --root-dir docs/.vitepress/dist
-            --include-mail=false
             --exclude "^file://"
             --accept '200..=299,403'
           # Don't fail action on broken links (we'll create an issue instead)