fix use of $architecture variable in build script

Author: SteveL-MSFT

.pipelines/DSC-Official.yml

@@ -5,7 +5,7 @@ pr:
   branches:
     include:
     - onebranch
-    - v3.*
+    - release/v*
 
 schedules:
 - cron: '0 3 * * 1'

build.ps1

@@ -661,13 +661,15 @@ if ($packageType -eq 'msixbundle') {
     }
 
     # for Linux, we only build musl as its statically linked, so we remove the musl suffix
-    if ($architecture -eq 'aarch64-unknown-linux-musl') {
-        $architecture = 'aarch64-linux'
+    $productArchitecture = if ($architecture -eq 'aarch64-unknown-linux-musl') {
+        'aarch64-linux'
     } elseif ($architecture -eq 'x86_64-unknown-linux-musl') {
-        $architecture = 'x86_64-linux'
+        'x86_64-linux'
+    } else {
+        $architecture
     }
 
-    $packageName = "DSC-$productVersion-$architecture.tar"
+    $packageName = "DSC-$productVersion-$productArchitecture.tar"
     $tarFile = Join-Path $PSScriptRoot 'bin' $packageName
     tar cvf $tarFile -C $tgzTarget .
     if ($LASTEXITCODE -ne 0) {