chore(Brewfile): add Azure Load Testing and GitHub Copilot extensions for VSCode

Author: hironow

dump/Brewfile

@@ -292,7 +292,9 @@ vscode "mikestead.dotenv"
 vscode "mohamed-nouri.websocket-client"
 vscode "mohsen1.prettify-json"
 vscode "ms-azure-devops.azure-pipelines"
+vscode "ms-azure-load-testing.microsoft-testing"
 vscode "ms-azuretools.azure-dev"
+vscode "ms-azuretools.vscode-azure-github-copilot"
 vscode "ms-azuretools.vscode-azureappservice"
 vscode "ms-azuretools.vscode-azurecontainerapps"
 vscode "ms-azuretools.vscode-azurefunctions"