style(mcl/*.nix): Format all .nix files

Author: monyarm

packages/mcl/src/src/mcl/utils/test/nix/shard-matrix-no-shards/flake.nix

@@ -1,7 +1,4 @@
 {
-  outputs =
-    { ... }:
-    {
-
-    };
+  outputs = {...}: {
+  };
 }