fix: do not scope _auth in npmrc

scoped legacy _auth only available since npm 8.x

Author: sargreal

lib/set-npmrc-auth.js

@@ -32,9 +32,7 @@ module.exports = async (
   if (NPM_USERNAME && NPM_PASSWORD && NPM_EMAIL) {
     await outputFile(
       npmrc,
-      `${currentConfig ? `${currentConfig}\n` : ''}${nerfDart(
-        registry
-      )}:_auth = \${LEGACY_TOKEN}\nemail = \${NPM_EMAIL}`
+      `${currentConfig ? `${currentConfig}\n` : ''}_auth = \${LEGACY_TOKEN}\nemail = \${NPM_EMAIL}`
     );
     logger.log(`Wrote NPM_USERNAME, NPM_PASSWORD and NPM_EMAIL to ${npmrc}`);
   } else if (NPM_TOKEN) {