niv niv: update e80fc8fa -> 55422d6f

## Changelog for niv:
Branch: master
Commits: [nmattia/niv@e80fc8fa...55422d6f](nmattia/niv@e80fc8f...55422d6)

* [`9e0a8184`](nmattia/niv@9e0a818) Recognize more tarball extensions ([nmattia/niv⁠#385](https://togithub.com/nmattia/niv/issues/385))
* [`55422d6f`](nmattia/niv@55422d6) Bump GHA runners ([nmattia/niv⁠#412](https://togithub.com/nmattia/niv/issues/412))

nix/sources.json

@@ -5,10 +5,10 @@
         "homepage": "https://github.com/nmattia/niv",
         "owner": "nmattia",
         "repo": "niv",
-        "rev": "e80fc8fae87cc91f449533fca6b9cadf8be69e6c",
-        "sha256": "024hnxvqk8z5n2n54rj05l91q38g9y8nwvrj46xml13kjmg4shb3",
+        "rev": "55422d6f2618cd2195eeafa3f16ae63fde723c15",
+        "sha256": "1s6m41hhsydf3lw6ihksc904vcpyd5agwiqq8hb8plyqvsyn74ba",
         "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/e80fc8fae87cc91f449533fca6b9cadf8be69e6c.tar.gz",
+        "url": "https://github.com/nmattia/niv/archive/55422d6f2618cd2195eeafa3f16ae63fde723c15.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {