Bump Node version in Nix flake (#11580)

- Bump Node.JS version to match `.node-version`:

6b810ee1e6/.node-version (L1)

flake.lock

@@ -6,11 +6,11 @@
         "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
-        "lastModified": 1713939967,
-        "narHash": "sha256-3YQSEYvAIHE40tx5nM9dgeEe0gsHjf15+gurUpyDYNw=",
+        "lastModified": 1731738660,
+        "narHash": "sha256-tIXhc9lX1b030v812yVJanSR37OnpTb/OY5rU3TbShA=",
         "owner": "nix-community",
         "repo": "fenix",
-        "rev": "5c3ff469526a6ca54a887fbda9d67aef4dd4a921",
+        "rev": "e10ba121773f754a30d31b6163919a3e404a434f",
         "type": "github"
       },
       "original": {
@@ -21,11 +21,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1713805509,
-        "narHash": "sha256-YgSEan4CcrjivCNO5ZNzhg7/8ViLkZ4CB/GrGBVSudo=",
+        "lastModified": 1731890469,
+        "narHash": "sha256-D1FNZ70NmQEwNxpSSdTXCSklBH1z2isPR84J6DQrJGs=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "1e1dc66fe68972a76679644a5577828b6a7e8be4",
+        "rev": "5083ec887760adfe12af64830a66807423a859a7",
         "type": "github"
       },
       "original": {
@@ -44,11 +44,11 @@
     "rust-analyzer-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1713801366,
-        "narHash": "sha256-VmzP5s59kb6//mj+ES+hslTLuugjd7OluGIXXcwuyHg=",
+        "lastModified": 1731693936,
+        "narHash": "sha256-uHUUS1WPyW6ohp5Bt3dAZczUlQ22vOn7YZF8vaPKIEw=",
         "owner": "rust-lang",
         "repo": "rust-analyzer",
-        "rev": "e31c9f3fe11148514c3ad254b639b2ed7dbe35de",
+        "rev": "1b90e979aeee8d1db7fe14603a00834052505497",
         "type": "github"
       },
       "original": {

flake.nix

@@ -38,7 +38,7 @@
 
             packages = with pkgs; [
               # === TypeScript dependencies ===
-              nodejs_20
+              nodejs_22
               corepack
               # === Electron ===
               electron