fix nsis arguments (from switching to linux)

.github/workflows/release.yml

@@ -49,7 +49,7 @@ jobs:
         uses: joncloud/makensis-action@v4
         with:
           script-file: packaging/Windows/ATCS_Installer.nsi
-          arguments: /DVERSION="${{ env.VERSION }}"
+          arguments: -DVERSION="${{ env.VERSION }}"
         continue-on-error: true
 
       - name: Determine Upload Files
@@ -60,7 +60,7 @@ jobs:
           if [ -f "./packaging/ATCS_${VERSION}_Setup.exe" ]; then
             FILES="$FILES ./packaging/ATCS_${VERSION}_Setup.exe"
           else
-            run: echo "::warning::exe-installer created by NSIS was not found; only ZIP will be uploaded."
+            echo "::error::exe-installer created by NSIS was not found; only ZIP will be uploaded."
           fi
           echo "files=$FILES" >> $GITHUB_OUTPUT