ci(docs): redeploy the site when install.sh changes

docs-gen publishes install.sh with the site, but the workflow only ran for
docs/**, tools/docgen/** and tools/ludic-cli/**. v0.5.2 changed install.sh,
CHANGELOG.md and VERSION — so nothing matched, no deploy ran, and the fix that
release existed for was never served to anyone running the one-liner.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.forgejo/workflows/docs.yml

@@ -11,6 +11,10 @@ on:
       - 'docs/**'
       - 'tools/docgen/**'
       - 'tools/ludic-cli/**'
+      # the site publishes the installer, so a change to it has to redeploy the
+      # site — otherwise a fixed install.sh sits in main while the old one is
+      # still what `curl … | sh` fetches
+      - 'install.sh'
       - '.forgejo/workflows/docs.yml'
   workflow_dispatch: {}