Arch is wrong in artifact name on Linux deb x64 target

[Mohamed Mohamedin]

• Electron-Builder Version: 24.9.1

• Node Version: 20

• Electron Version:28.1.0
• Electron Type (current, beta, nightly): current

• Target: Linux (Debian)

We use the following configuration (the important part shown)

{
   "artifactName": "${productName}-${arch}-${version}.${ext}",
   "linux": {	
      "target": [
      { "target": "deb", "arch": [
          "x64",
          "arm64"
        ]
      }
    ],
  }
}

But, in recent builds we get the artifactName arch as amd64 instead of x64 as before (and as other targets and systems do)