We can't hash the unsigned installer for winget

.github/workflows/ci-pipeline.yml

@@ -1534,15 +1534,9 @@ jobs:
     - name: Build ReleaseNotes
       run: dotnet build -c Release tools/ReleaseNotes
 
-    - name: Retrieve Installer .exe
-      uses: actions/download-artifact@v3
-      with:
-        name: packaging-windows
-        path: packaging-windows
-
     - name: Execute Push Script
       shell: powershell
-      run: build/package/winget/push_manifest.ps1 -InstallerPath packaging-windows/tgstation-server-installer.exe
+      run: build/package/winget/push_manifest.ps1
 
     - name: Run ReleaseNotes with --link-winget
       run: dotnet run -c Release --no-build --project tools/ReleaseNotes --link-winget ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}

build/package/winget/push_manifest.ps1

@@ -1,14 +1,20 @@
-param(
-    [string]$InstallerPath = 'build/package/winget/Tgstation.Server.Host.Service.Wix.Bundle/x86/Release/tgstation-server-installer.exe'
-)
-
 $ErrorActionPreference="Stop"
 
 [XML]$versionXML = Get-Content build/Version.props -ErrorAction Stop
 
 $tgsVersion = $versionXML.Project.PropertyGroup.TgsCoreVersion
 
-$installerHash = Get-FileHash -Path $InstallerPath -ErrorAction Stop # SHA256 is the default
+mkdir artifacts
+$previousProgressPreference = $ProgressPreference
+$ProgressPreference = 'SilentlyContinue'
+try
+{
+    Invoke-WebRequest -Uri "https://github.com/tgstation/tgstation-server/releases/download/tgstation-server-v$tgsVersion/tgstation-server-installer.exe" -OutFile "artifacts/tgstation-server-installer.exe"
+} finally {
+    $ProgressPreference = $previousProgressPreference
+}
+
+$installerHash = Get-FileHash -Path "artifacts/tgstation-server-installer.exe" -ErrorAction Stop # SHA256 is the default
 
 cd build/package/winget/manifest
 try