TF-4029 Fix singular vs plural for attachments

lib/features/composer/presentation/extensions/composer_print_draft_extension.dart

@@ -100,7 +100,9 @@ extension ComposerPrintDraftExtension on ComposerController {
           ccPrefix: appLocalizations.cc_email_address_prefix,
           bccPrefix: appLocalizations.bcc_email_address_prefix,
           replyToPrefix: appLocalizations.replyToEmailAddressPrefix,
-          titleAttachment: appLocalizations.attachments.toLowerCase(),
+          titleAttachment: uploadController.allAttachmentsUploaded.length > 1
+              ? appLocalizations.attachments.toLowerCase()
+              : appLocalizations.attachment.toLowerCase(),
           toAddress: listToEmailAddress.toSet().listEmailAddressToString(
             isFullEmailAddress: true,
           ),

lib/features/composer/presentation/widgets/attachment_header_composer_widget.dart

@@ -57,7 +57,9 @@ class AttachmentHeaderComposerWidget extends StatelessWidget {
             ),
             const SizedBox(width: AttachmentHeaderComposerWidgetStyle.space / 2),
             Text(
-              '${listFileUploaded.length} ${AppLocalizations.of(context).attachments}',
+                listFileUploaded.length > 1
+                  ? '${listFileUploaded.length} ${AppLocalizations.of(context).attachments}'
+                  : '${listFileUploaded.length} ${AppLocalizations.of(context).attachment}',
               style: AttachmentHeaderComposerWidgetStyle.labelTextSize
             ),
             const SizedBox(width: AttachmentHeaderComposerWidgetStyle.space),