fix(typescript): file arrays call appendFile (#4787)

generators/typescript/sdk/CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.40.8] - 2024-09-28
+
+- Fix: File array uploads now call `request.appendFile` instead of `request.append` which 
+  was causing form data to be in a corrupted state. 
+
 ## [0.40.7] - 2024-09-28
 
 - Fix: The generated README will now have a section that links to the generated

generators/typescript/sdk/VERSION

@@ -1 +1 @@
-0.40.7
+0.40.8

generators/typescript/sdk/client-class-generator/src/endpoints/utils/appendPropertyToFormData.ts

@@ -60,7 +60,7 @@ export function appendPropertyToFormData({
                     ),
                     ts.factory.createBlock(
                         [
-                            context.coreUtilities.formDataUtils.append({
+                            context.coreUtilities.formDataUtils.appendFile({
                                 referencetoFormData: referenceToFormData,
                                 key: property.key.wireValue,
                                 value: ts.factory.createIdentifier(FOR_LOOP_ITEM_VARIABLE_NAME)