Bump hackage-overlay-tool

ci/nix/sources.json

@@ -53,10 +53,10 @@
         "homepage": null,
         "owner": "bgamari",
         "repo": "hackage-overlay-repo-tool",
-        "rev": "ae385155d319cd1fa85f359c2b903abb0cf47b90",
-        "sha256": "01xhbzc4pq3jrm258lk8lfq3gr3049bfa46bqn9hj66d6x5xdcwg",
+        "rev": "8fdc6a32292db3b54d02b6689ec6b2af10059a0d",
+        "sha256": "1af6v50mhigl4djfixiiwmb126zjbgnnndaqjhvj11smn90ikp90",
         "type": "tarball",
-        "url": "https://github.com/bgamari/hackage-overlay-repo-tool/archive/ae385155d319cd1fa85f359c2b903abb0cf47b90.tar.gz",
+        "url": "https://github.com/bgamari/hackage-overlay-repo-tool/archive/8fdc6a32292db3b54d02b6689ec6b2af10059a0d.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }