fix(web): soften two false claims for closed-beta honesty

Audit found two website claims with no backing implementation:
- '3 marketplace plugins included' (free tier) -> 'Plugin marketplace access
  (coming soon)'. The marketplace is not built; there are no free plugins.
- 'Connectors - day one' -> 'Connectors (rolling out)'. Only a few connectors
  are available; Slack is coming-soon, Gmail/Drive not yet shipped.

String-content only; elc syntax-checks clean. Three other audit flags (no-card
wording, crisis-line copy, post-quantum 'everything encrypted') intentionally
NOT touched - left for human review (sensitive / conflicting evidence).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/marketplace.el

@@ -77,7 +77,7 @@ fn marketplace_categories() -> String {
 
     el_div(
         "class=\"marketplace-categories reveal\" style=\"transition-delay:320ms\"",
-        marketplace_tags_block("Connectors - day one", connectors) +
+        marketplace_tags_block("Connectors (rolling out)", connectors) +
         marketplace_tags_block("Following launch", following) +
         el_div(
             "",