bump(grafana-cloud-mcp): a5c72f2d → 12be5634 (#4302)

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

.claude-plugin/marketplace.json

@@ -1492,7 +1492,7 @@
         "url": "https://github.com/grafana/ai-marketplace.git",
         "path": "plugins/grafana-cloud-mcp",
         "ref": "main",
-        "sha": "a5c72f2d74c640e9675eb0249526447968535015"
+        "sha": "12be5634a492f73c189d466c5449d09b853ad7a4"
       },
       "homepage": "https://grafana.com"
     },