Add 4 testers to contributors page + refine deploy.yml triggers

Contributors page (app/[locale]/docs/about/contributors/page.tsx):
add heriberto, JF_Carr, rafapuerta and JcMinarro to the testers
grid. All with the "testing" role and GitHub's default avatar URL
(https://github.com/<handle>.png) so the entries work immediately
without requiring custom avatar files. Swap to a per-contributor
/images/avatars/<name>.png later if/when custom artwork is ready.

deploy.yml triggers: drop `guides/**` (the legacy /guides/[slug]/
page that read those markdown files was removed in PR #211 — the
folder no longer affects what the web renders) and `scripts/**`
(the bash scripts get rsynced into public/scripts/ during prebuild
but they are downloaded by users via install_proxmenux.sh, not
browsed via the doc site, so a stale copy is harmless). Add
`lang/**` so future translated CHANGELOG / docs (e.g. the Spanish
CHANGELOG just shipped in PR #217) auto-deploy.

Local build verified: 232 pages, 14450 indexed words, no errors.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -6,8 +6,7 @@ on:
       - "main"
     paths:
       - "web/**"
-      - "guides/**"
-      - "scripts/**"
+      - "lang/**"
       - "CHANGELOG.md"
   workflow_dispatch: