chore: bump version to 1.1.3, update CHANGELOG

Version: 1.1.2 → 1.1.3 (patch)

Changelog entry documents 11 documentation accuracy fixes and 1 test
improvement addressed in 183db70 (PR review comments).

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

.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "unraid",
   "description": "Query, monitor, and manage Unraid servers via GraphQL API - array status, disk health, containers, VMs, system monitoring",
-  "version": "1.1.2",
+  "version": "1.1.3",
   "author": {
     "name": "jmagar",
     "email": "jmagar@users.noreply.github.com"