Update incident-io to v1.20261009.666

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.github/plugin/marketplace.json

@@ -1266,7 +1266,7 @@
     {
       "name": "incident-io",
       "description": "Official incident.io plugins for AI agents: skills for working with [incident.io](https://incident.io/) — incidents, on-call, and investigations — and for authoring the operational content our platform draws on.",
-      "version": "0.18.0",
+      "version": "1.20261009.666",
       "author": {
         "name": "incident.io",
         "url": "https://incident.io"
@@ -1286,7 +1286,7 @@
         "source": "github",
         "repo": "incident-io/skills",
         "path": "plugins/incident-io",
-        "sha": "6d0bbfc9e52256fc39326b9ba6d08f16831b60ae"
+        "sha": "52f1c60db6d59b2e4e6abd327d5107d3bff0f53d"
       }
     },
     {