Removing posthog pin

.claude-plugin/marketplace.json

@@ -923,8 +923,7 @@
       "category": "monitoring",
       "source": {
         "source": "url",
-        "url": "https://github.com/PostHog/ai-plugin.git",
-        "sha": "f2f37954ecef9f1afce4fa81b6a612454a96c410"
+        "url": "https://github.com/PostHog/ai-plugin.git"
       },
       "homepage": "https://posthog.com/docs/model-context-protocol"
     },