Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -4,8 +4,6 @@
   - windows
   - windows-1809
 
-image: mcr.microsoft.com/dotnet/core/sdk
-
 before_script:
   - dotnet restore
 
@@ -21,7 +19,7 @@ uptool:
       [System.Environment]::GetEnvironmentVariable("Path","User")
     ) -match '.' -join ';'
     python DownloadDataDepsInstall.py
-    ffmpeg
+    ffmpeg --help
     python DownloadData.py
     $(new-object System.Net.WebClient).DownloadFile("https://www.github.com/JFronny/UpTool2/releases/latest/download/Tools.zip", "$($(pwd).Path)\Tools.zip")
     & "C:\Program Files\7-Zip\7z.exe" x .\Tools.zip