use home runner path

Author: benbp

.github/workflows/copilot-setup-steps.yml

@@ -23,5 +23,5 @@ jobs:
         run: |
           set -ex
           dotnet publish -f net8.0 -c Release -r linux-x64 -p:PublishSingleFile=true --self-contained --output ./artifacts/linux-x64 ./tools/azsdk-cli/Azure.Sdk.Tools.Cli/Azure.Sdk.Tools.Cli.csproj
-          cp ./artifacts/linux-x64/azsdk $GITHUB_WORKSPACE/azsdk
-          $GITHUB_WORKSPACE/azsdk --help
+          cp ./artifacts/linux-x64/azsdk /home/runner/azsdk
+          /home/runner/azsdk --help