[13.x] Add an optional migration for oauth_clients table to the upgrade guide

[hafezdivandari]

• Fixes No migration template in the UPGRADE guide #1833

[majchrosoft]

$table->nullableMorphs('owner')->after('user_id');

  Call to a member function after() on null

  at database/migrations/2025_08_20_123028_passport_manual_update.php:16
     12▕      */
     13▕     public function up(): void
     14▕     {
     15▕         Schema::table('oauth_clients', function (Blueprint $table) {
  ➜  16▕             $table->nullableMorphs('owner')->after('user_id');
     17▕ 
     18▕             $table->after('provider', function (Blueprint $table) {
     19▕                 $table->text('redirect_uris');
     20▕                 $table->text('grant_types');
     
     
    

valid use of nullableMorphs

            $table->nullableMorphs('owner', null, 'user_id');

[hafezdivandari]

Thanks @majchrosoft PR #1853 has been submitted to resolve this.