fix: update MCP Registry schema to current draft version

The dated schema 2025-10-17 is now deprecated by the MCP Registry.
Migrated to draft schema URL as per registry requirements.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: julienld

server.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json",
+  "$schema": "https://static.modelcontextprotocol.io/schemas/draft/server.schema.json",
   "name": "io.github.homeassistant-ai/ha-mcp",
   "description": "Comprehensive Model Context Protocol server for managing Home Assistant through AI assistants.",
   "repository": {