Allow indexing of legal pages in robots.txt

Mentions legales, CGU, CGV, hebergement, cookies, RGPD, conformite
are now allowed for crawling instead of disallowed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Controller/RobotsController.php

@@ -22,12 +22,13 @@ Disallow: /mon-compte
 Disallow: /external-redirect
 Disallow: /my-csp-report
 Disallow: /track/
-Disallow: /mentions-legales
-Disallow: /cgu
-Disallow: /cgv
-Disallow: /hebergement
-Disallow: /cookies
-Disallow: /rgpd
+Allow: /mentions-legales
+Allow: /cgu
+Allow: /cgv
+Allow: /hebergement
+Allow: /cookies
+Allow: /rgpd
+Allow: /conformite
 Disallow: /unsubscribe/
 
 Sitemap: {$sitemapUrl}