message: [tests] Fix update-next script
  Follow up to since exec returns a buffer, not a string.
diff: @@ -2,8 +2,11 @@ const { execFileSync } = require('child_process');
  function exec(cmd, args, opts) {
  // eslint-disable-next-line no-console
  - console.log(`${cmd} ${args.join(' ')}`);
  - return execFileSync(cmd, args, opts);
  + console.log({ input: `${cmd} ${args.join(' ')}` });
  + const output = execFileSync(cmd, args, opts).toString().trim();
  + console.log({ output });
  + console.log();
  + return output;
  }
  module.exports = async ({ github, context }) => {
  