chore: bump version to 2.22.6

Version bump to trigger automated release workflow with YAML fix.

This version bump combined with the YAML syntax fix will:
- Trigger the release workflow (version 2.22.5 → 2.22.6)
- Test the complete release pipeline end-to-end
- Publish v2.22.6 to npm registry
- Create GitHub release v2.22.6
- Build and push Docker images

Previous versions 2.22.4 and 2.22.5 failed to publish due to YAML parsing
errors in the release workflow (resolved in previous commit).

Concieved by Romuald Członkowski - www.aiadvisors.pl/en

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

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.22.5",
+  "version": "2.22.6",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

package.runtime.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp-runtime",
-  "version": "2.22.5",
+  "version": "2.22.6",
   "description": "n8n MCP Server Runtime Dependencies Only",
   "private": true,
   "dependencies": {