fix build: try not using utility proc by default (microsoft#152416)

try not using utility proc by default

Author: sbatten

src/vs/workbench/contrib/extensions/browser/extensions.contribution.ts

@@ -227,7 +227,7 @@ Registry.as<IConfigurationRegistry>(ConfigurationExtensions.Configuration)
 			'extensions.experimental.useUtilityProcess': {
 				type: 'boolean',
 				description: localize('extensionsUseUtilityProcess', "When enabled, the extension host will be launched using the new UtilityProcess Electron API."),
-				default: true
+				default: false
 			},
 			[WORKSPACE_TRUST_EXTENSION_SUPPORT]: {
 				type: 'object',