bump(superpowers): 8cf39006 → 284be590 (#2910)

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

.claude-plugin/marketplace.json

@@ -2686,7 +2686,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/obra/superpowers.git",
-        "sha": "8cf39006140a743dce31ba4046fceab90cc214e6"
+        "sha": "284be5905ed540d34ce5bcde24728b9b7f413ea0"
       },
       "homepage": "https://github.com/obra/superpowers.git"
     },