bump(sanity): 0bf99224 → 77a54f78 (#5186)

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

.claude-plugin/marketplace.json

@@ -3103,7 +3103,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/sanity-io/agent-toolkit.git",
-        "sha": "0bf992248cc883b86d3d22e2631ff9b982d1f94b"
+        "sha": "77a54f785085b7a70fb98ce9e33ef80f3775fce8"
       },
       "homepage": "https://www.sanity.io"
     },