website: update meta description — remove 500+, align to new tagline

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: aborruso

website/src/layouts/Layout.astro

@@ -9,7 +9,7 @@ interface Props {
 
 const {
   title,
-  description = 'MCP server for interacting with CKAN open data portals. Search datasets, query DataStore, explore organizations on 500+ portals worldwide with AI-powered tools.',
+  description = 'Turn any CKAN open data portal into a conversation. Search datasets, query tabular data, explore organizations — no CKAN knowledge required.',
   image = '/ckan-mcp-server/og-image.png'
 } = Astro.props;