chore(mcp): align the MCP manager version with the release

The master sync moved every release member to 0.2.1-alpha.2; the MCP
manager, added in this branch, kept the previous version.

packages/mcp/mcp-manager/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@deepseek-ai/dsh-mcp-manager",
   "description": "MCP server manager: a settings-driven fleet of mcp-client instances with runtime status, restart, and probe",
-  "version": "0.2.1-alpha.1",
+  "version": "0.2.1-alpha.2",
   "publishConfig": {
     "access": "public"
   },