refactor: generate migrations with override attributes

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

core/Command/Db/Migrations/GenerateCommand.php

@@ -38,6 +38,7 @@ use Closure;
 use OCP\DB\ISchemaWrapper;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
+use Override;
 
 /**
  * FIXME Auto-generated migration step: Please modify to your needs!
@@ -49,6 +50,7 @@ class {{classname}} extends SimpleMigrationStep {
 	 * @param Closure(): ISchemaWrapper $schemaClosure
 	 * @param array $options
 	 */
+	#[Override]
 	public function preSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
 	}
 
@@ -58,6 +60,7 @@ class {{classname}} extends SimpleMigrationStep {
 	 * @param array $options
 	 * @return null|ISchemaWrapper
 	 */
+	#[Override]
 	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
 {{schemabody}}
 	}
@@ -67,6 +70,7 @@ class {{classname}} extends SimpleMigrationStep {
 	 * @param Closure(): ISchemaWrapper $schemaClosure
 	 * @param array $options
 	 */
+	#[Override]
 	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
 	}
 }