chore: add linkwarden to bug report issue template

Signed-off-by: Marcel Klehr <[email protected]>

Author: marcelklehr

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -33,6 +33,7 @@ body:
       multiple: false
       options:
         - Nextcloud Bookmarks
+        - Linkwarden
         - WebDAV
         - Google Drive
         - Git