Update ghc-artefact-nix to deal with bindists which link against numa

ci/nix/sources.json

@@ -17,10 +17,10 @@
         "homepage": null,
         "owner": "mpickering",
         "repo": "ghc-artefact-nix",
-        "rev": "b2d8eb407a249fb05000a448fdad9f86ee752015",
-        "sha256": "1x8cvvfxc58i1qyx30y69263gh30pc34va0xvw08jqqlbgdawck6",
+        "rev": "3684936ecde09234f51410e07ccd1c7f48d4f4ac",
+        "sha256": "17aly3bz9im5zcz9vazi3a4dqpw6xsqsk2afwb1r6mxn92wfzcys",
         "type": "tarball",
-        "url": "https://github.com/mpickering/ghc-artefact-nix/archive/b2d8eb407a249fb05000a448fdad9f86ee752015.tar.gz",
+        "url": "https://github.com/mpickering/ghc-artefact-nix/archive/3684936ecde09234f51410e07ccd1c7f48d4f4ac.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "hackage-security": {