chore(nix): Update package to v0.104.1 (#456)

## Automated Nix Package Update

This PR updates the Nix package expression to version **0.104.1**.

### Changes
- ✅ Updated `version` to `0.104.1`
- ✅ Updated source `hash` to
`sha256-vVWZzqxVO+ZSm4Zb6vRqvSGCmAhgTLnCLNJcKiBK5zQ=`
- ✅ Updated `vendorHash` to
`sha256-bsJ61iCA7N9YMx0L9URbb6sq/n1+U91VVs+oNkoxopA=`
- ✅ Formatted with nixfmt-rfc-style

The `Nix Build Verification` workflow runs on this PR and is the
authoritative gate for verifying the updated hashes build cleanly.

### Verification
```bash
nix-build nix/default.nix
result/bin/infer version
```

### Related
- Release:
https://github.com/inference-gateway/cli/releases/tag/v0.104.1

---
🤖 Auto-generated by `.github/workflows/nix-version-sync.yml`

Co-authored-by: ig-semantic-release-bot[bot] <207089317+ig-semantic-release-bot[bot]@users.noreply.github.com>

Author: github-actions[bot]

nix/package.nix

@@ -12,16 +12,16 @@ buildGoModule (finalAttrs: {
   __structuredAttrs = true;
 
   pname = "infer";
-  version = "0.104.0";
+  version = "0.104.1";
 
   src = fetchFromGitHub {
     owner = "inference-gateway";
     repo = "cli";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-RnmDYFoe2KYj32tVkXelxtgm9j7UL9IcFlBDUgsMAK8=";
+    hash = "sha256-vVWZzqxVO+ZSm4Zb6vRqvSGCmAhgTLnCLNJcKiBK5zQ=";
   };
 
-  vendorHash = "sha256-Z1EQAScRDSGVdnQXyrjGH+b84rG53IK4oKNJg845AWY=";
+  vendorHash = "sha256-bsJ61iCA7N9YMx0L9URbb6sq/n1+U91VVs+oNkoxopA=";
 
   # Use the Go module proxy layout instead of `go mod vendor`. The robotgo
   # dependency includes CGO `#include` directives that reference C headers