fix(nix): refresh npmDepsHash, stale since well before this branch

nix-check.yml only runs on PRs touching package-lock.json or nix/**, so it fires
here on a two-line version bump and reports a mismatch this branch did not cause.
The recorded hash was pinned to a dependency set that main's lockfile stopped
resolving to some time ago — exactly the drift that workflow was added to surface,
now surfaced by the first PR to touch the lockfile since.

The bump changes two lines, both the `version` field, and no dependency at all,
so nothing here alters what npm resolves. Setting it to what
`prefetch-npm-deps package-lock.json` reports makes `nix build` work again.

That bump also repairs a related inconsistency: main's package-lock.json still
said 1.8.0 while package.json said 1.9.0, which is the exact failure
set-release-version.mjs exists to prevent and which predates it.

Author: EtienneLescot

nix/package.nix

@@ -37,7 +37,7 @@ buildNpmPackage {
       );
     };
 
-  npmDepsHash = "sha256-ArM73XLVYUB+92Pz7sCbh4Fj67xwakEusaaOSjxMEe8=";
+  npmDepsHash = "sha256-I0UeoZ8kWHwg2dZDHhCjBIo5BkPWi5c0DwrMywiphIo=";
 
   env.ELECTRON_SKIP_BINARY_DOWNLOAD = "1";