bump(posthog): 884a62b8 → 70e8e0a8 (#5579)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.claude-plugin/marketplace.json

@@ -2719,7 +2719,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/PostHog/ai-plugin.git",
-        "sha": "884a62b8427947d2f98214cb6fd5e05272795a71"
+        "sha": "70e8e0a8b4052047f26956e8598d3a2ff0f4db14"
       },
       "homepage": "https://posthog.com/docs/model-context-protocol"
     },