Update nightly rustc to 20250301 and regen flake.lock

dev/nix-ide-semantic-highlighting.patch

@@ -1,21 +1,17 @@
-diff --git a/package.json b/package.json
 --- a/package.json
 +++ b/package.json
-@@ -100,7 +100,15 @@
-         "editor.insertSpaces": true,
-         "editor.tabSize": 2
+@@ -124,6 +124,14 @@
+         "category": "Nix IDE",
+         "command": "nix-ide.restartLanguageServer"
        }
--    }
-+    },
++    ],
 +    "semanticTokenScopes": [
 +      {
 +        "language": "nix",
 +        "scopes": {
 +          "*.withAttribute": ["markup.underline"]
 +        }
 +      }
-+    ]
+     ]
    },
    "devDependencies": {
-     "@commitlint/cli": "*",
-

dev/vim-coc.nix

@@ -120,15 +120,7 @@ pkgs.vim_configurable.customize {
       vim-nix # File type and syntax highlighting.
       coc-nvim
       coc-json
-      # FIXME
-      (nightfox-nvim.overrideAttrs (old: {
-        src = pkgs.fetchFromGitHub {
-          owner = "EdenEast";
-          repo = "nightfox.nvim";
-          rev = "15f3b5837a8d07f45cbe16753fbf13630bc167a3";
-          hash = "sha256-Uq+Rp4uoI+AUEUoSWXInB49bCldPz5f9KtinFMKF8iM=";
-        };
-      }))
+      nightfox-nvim
     ];
   };
 }

flake.nix

@@ -20,7 +20,7 @@ rec {
       inherit (nixpkgs) lib;
 
       # For rustfmt and fuzz.
-      nightlyVersion = "2024-11-01";
+      nightlyVersion = "2025-03-01";
 
       mtime = self.lastModifiedDate;
       date = "${substring 0 4 mtime}-${substring 4 2 mtime}-${substring 6 2 mtime}";