Update src/main.ps1

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: MariusStorhaug

src/main.ps1

@@ -3,10 +3,13 @@ switch ($true) {
         $architecture = (uname -m)
         if ($architecture -eq 'aarch64') {
             Import-Module "$PSScriptRoot/libs/linux-arm64/PSModule.Sodium.dll"
-        } else {
+            $script:Supported = $true
+        } elseif ($architecture -eq 'x86_64') {
             Import-Module "$PSScriptRoot/libs/linux-x64/PSModule.Sodium.dll"
+            $script:Supported = $true
+        } else {
+            throw "Unsupported Linux architecture: $architecture. Please refer to the documentation for supported architectures."
         }
-        $script:Supported = $true
     }
     $IsMacOS {
         if ("$(sysctl -n machdep.cpu.brand_string)" -Like 'Apple*') {