chore: sync server.json version with PyPI release

Author: tspicer

server.json

@@ -2,7 +2,7 @@
   "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
   "name": "io.github.KuudoAI/amazon_ads_mcp",
   "description": "Amazon Ads API MCP server for Amazon Advertising API",
-  "version": "0.2.4",
+  "version": "0.2.6",
   "repository": {
     "url": "https://github.com/KuudoAI/amazon_ads_mcp",
     "source": "github"
@@ -11,7 +11,7 @@
     {
       "registryType": "pypi",
       "identifier": "amazon-ads-mcp",
-      "version": "0.2.4",
+      "version": "0.2.6",
       "transport": {
         "type": "stdio",
         "args": [