hardcode vpk channel

.github/workflows/build.yml

@@ -8,6 +8,9 @@ jobs:
   build:
     name: Build Launcher
     runs-on: ubuntu-latest
+    env:
+      VPK_CHANNEL: win
+      VPK_OUTPUT_DIR: Releases
     steps:
       - uses: actions/checkout@master
         with:
@@ -57,7 +60,7 @@ jobs:
           VPK_NO_PORTABLE: true
           VPK_FRAMEWORK: net8.0-x64-desktop,vcredist120-x64,vcredist143-x64
           
-      - run: ~/.dotnet/tools/vpk upload s3 -o Releases --bucket $VPK_BUCKET --endpoint $VPK_ENDPOINT
+      - run: ~/.dotnet/tools/vpk upload s3 -o $VPK_OUTPUT_DIR --bucket $VPK_BUCKET --endpoint $VPK_ENDPOINT
         name: Upload new release
         env:
           VPK_KEY_ID: ${{ secrets.S3_KEY_ID }}