fix(ci): exclude kirby/panel/dist from FTP --delete

The panel/dist is compiled by Kirby and not in the repo.
The mirror --delete was wiping it on every deploy.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/deploy.yml

@@ -45,6 +45,7 @@ jobs:
             -x 'sessions/' \
             site site;
           mirror --reverse --delete --verbose --ignore-time --parallel=10 \
+            -x 'panel/' \
             kirby kirby;
           mirror --reverse --delete --verbose --ignore-time --parallel=10 \
             vendor vendor;