Fix: File Upload (#4806)

File upload issue fixed.
There was a type mismatch and isDate was returning false

packages/twenty-front/src/modules/activities/files/hooks/useUploadAttachmentFile.tsx

@@ -45,6 +45,7 @@ export const useUploadAttachmentFile = () => {
       fullPath: attachmentUrl,
       type: getFileType(file.name),
       [targetableObjectFieldIdName]: targetableObject.id,
+      createdAt: new Date().toISOString(),
     } as Partial<Attachment>;
 
     await createOneAttachment(attachmentToCreate);