[ci] Fix the release:changelog cmd (mui#43451)

Author: mnajdova

scripts/releaseChangelog.mjs

@@ -206,7 +206,7 @@ yargs(process.argv.slice(2))
         })
         .option('release', {
           // #default-branch-switch
-          default: 'next',
+          default: 'master',
           describe: 'Ref which we want to release',
           type: 'string',
         })