chore(workflows): trigger web CI + deploy on docs/ changes

Now that docs/ is the single source of truth that the marketing site
renders at build time, edits to those files must run web CI and trigger
the Cloudflare deploy. Add `docs/**` to the paths filter in both
web-ci.yml and web-deploy.yml.

A markdown-only fix in docs/ is now sufficient to redeploy
oh-my-openagent.com — no companion web/ change needed.

.github/workflows/web-deploy.yml

@@ -11,6 +11,7 @@ on:
     branches: [master, dev]
     paths:
       - "web/**"
+      - "docs/**"
       - ".github/workflows/web-deploy.yml"
 
 concurrency: