Install required workloads

Author: kerryjiang

.github/workflows/myget.yml

@@ -16,6 +16,9 @@ jobs:
                 dotnet-version: '8.0.x'
             - name: Set env
               run: echo "DOTNET_CLI_TELEMETRY_OPTOUT=1" >> $GITHUB_ENV
+            - name: Install required workloads
+              run:  |
+                dotnet workload install android ios maccatalyst tvos macos maui wasm-tools --source https://aka.ms/dotnet8/nuget/index.json --source https://api.nuget.org/v3/index.json
             - uses: dotnet/nbgv@master
               id: nbgv
             - name: Pack