PR feedback

Signed-off-by: Renan Rangel <[email protected]>

changelog/21.0/21.0.0/summary.md

@@ -135,10 +135,10 @@ Example usage:
 
 ### <a id="new-backup-engine"/>New Backup Engine (EXPERIMENTAL)
 
-We are introducing a the backup engine supporting logical backups starting on v21 to support use cases that require something else besides physical backups. This is experimental and is based on the 
+We are introducing a backup engine supporting logical backups starting on v21 to support use cases that require something else besides physical backups. This is experimental and is based on the 
 [MySQL Shell](https://dev.mysql.com/doc/mysql-shell/8.0/en/).
 
-The new engine is enabled by using `--backup_engine_implementation=mysqlshell`. There are other options that are required, so check the docs on which options are required and how to use it.
+The new engine is enabled by using `--backup_engine_implementation=mysqlshell`. There are other options that are required, so [check the docs](https://vitess.io/docs/21.0/user-guides/operating-vitess/backup-and-restore/creating-a-backup/) on which options are required and how to use it.
 
 ### <a id="dynamic-vreplication-configuration"/>Dynamic VReplication Configuration
 Currently many of the configuration options for VReplication Workflows are vttablet flags. This means that any change 

go/vt/mysqlctl/mysqlshellbackupengine.go

@@ -85,6 +85,8 @@ type MySQLShellBackupManifest struct {
 }
 
 func init() {
+	BackupRestoreEngineMap[mysqlShellBackupEngineName] = &MySQLShellBackupEngine{}
+
 	for _, cmd := range []string{"vtcombo", "vttablet", "vtbackup", "vttestserver", "vtctldclient"} {
 		servenv.OnParseFor(cmd, registerMysqlShellBackupEngineFlags)
 	}
@@ -578,7 +580,3 @@ func cleanupMySQL(ctx context.Context, params RestoreParams, shouldDeleteUsers b
 
 	return err
 }
-
-func init() {
-	BackupRestoreEngineMap[mysqlShellBackupEngineName] = &MySQLShellBackupEngine{}
-}