re-pack the thunk

obelisk/dep/haskell-magic-wormhole/github.json

 {
   "owner": "LeastAuthority",
   "repo": "haskell-magic-wormhole",
-  "branch": "fix-build",
+  "branch": "66.app-versions.2",
   "private": false,
-  "rev": "6d7b1594ea8d4cb037ff501fc40502126af2dfd2",
-  "sha256": "1s1nlynk56agmnapx4d3p9dljlbd7m2ash79b9ajlbmp89d2l9qy"
+  "rev": "aff7a599101b3340a625ede22537485f2ede5804",
+  "sha256": "0ndsarvkqsbf0xl8ckqvgililh4x6shk8lf7fhxa9lddqq9lr9pc"
 }