chore(repo): fix beta lints issues (#4053)

Author: NikaHsn

packages/amplify_core/lib/src/config/amplify_plugin_config.dart

@@ -20,7 +20,7 @@ abstract class AmplifyPluginConfig with AWSSerializable {
 
 /// {@template amplify_core.unknown_plugin_config_factory}
 /// A plugin factory for unknown plugin configs.
-/// @{endtemplate}
+/// {@endtemplate}
 @internal
 class UnknownPluginConfigFactory
     extends AmplifyPluginConfigFactory<UnknownPluginConfig> {

packages/amplify_core/lib/src/state_machine/exception.dart

@@ -3,7 +3,7 @@
 
 import 'package:aws_common/aws_common.dart';
 
-/// (@template amplify_core.state_machine.precondition_exception)
+/// {@template amplify_core.state_machine.precondition_exception}
 /// An exception raised within a state machine when an event could not be
 /// processed due to some precondition not being met.
 /// {@endtemplate}

packages/amplify_core/lib/src/types/models/auth_rule.dart

@@ -76,7 +76,7 @@ class AuthRule {
       'groupClaim': groupClaim,
       'groups': groups,
       'groupsField': groupsField,
-      'provider': provider != null ? provider!.name : null,
+      'provider': provider?.name,
       'operations': operations?.map((op) => op.name).toList(),
     };
     return Map<String, dynamic>.from(map)

packages/analytics/amplify_analytics_pinpoint_dart/lib/src/impl/flutter_provider_interfaces/legacy_native_data_provider.dart

@@ -4,6 +4,7 @@
 import 'dart:async';
 
 /// {@template amplify_analytics_pinpoint.flutter_legacy_native_data_provider}
+/// {@endtemplate}
 abstract class LegacyNativeDataProvider {
   /// Get stored Pinpoint Endpoint Id.
   Future<String?> getEndpointId(String pinpointAppId);

packages/smithy/smithy/lib/src/types/timestamp.dart

@@ -15,7 +15,7 @@ import 'package:smithy/ast.dart';
 /// {@template aws.smithy.timestamp}
 /// A [DateTime] wrapper which provides custom formatting and parsing options
 /// for use with Smithy services.
-/// @{endtemplate}
+/// {@endtemplate}
 class Timestamp {
   /// {@macro aws.smithy.timestamp}
   Timestamp(DateTime timestamp) : _timestamp = timestamp.stripMicroseconds();

packages/storage/amplify_storage_s3_dart/lib/src/storage_s3_service/service/task/s3_download_task.dart

@@ -15,7 +15,7 @@ import 'package:smithy_aws/smithy_aws.dart' as smithy_aws;
 
 /// {@template amplify_storage_s3_dart.download_task}
 /// A task created to fulfill a download operation.
-/// {@template}
+/// {@endtemplate}
 @internal
 class S3DownloadTask {
   /// {@macro amplify_storage_s3_dart.download_task}

packages/storage/amplify_storage_s3_dart/lib/src/storage_s3_service/transfer/database/transfer_record.dart

@@ -10,7 +10,7 @@ part 'transfer_record.g.dart';
 /// {@template amplify_storage_s3_dart.transfer_data}
 /// the type used by Storage S3 plugin upload operations when using s3 multipart upload.
 /// it is persisted to TransferDatabase.
-/// {@endtemplate amplify_storage_s3_dart.transfer_data}
+/// {@endtemplate}
 @JsonSerializable()
 class TransferRecord {
   /// {@macro amplify_storage_s3_dart.transfer_data}

packages/worker_bee/worker_bee/lib/src/common.dart

@@ -20,7 +20,7 @@ final _voidType = _typeOf<void>();
 /// {@endtemplate}
 abstract class WorkerBeeCommon<Request extends Object, Response>
     implements AWSLoggerPlugin, Closeable {
-  /// {@template worker_bee.worker_bee_common}
+  /// {@macro worker_bee.worker_bee_common}
   WorkerBeeCommon({
     Serializers? serializers,
   }) : serializers = serializers == null