fix(typescript): use bracket notation for non-identifier property names in file upload requests#11084

tjb9dc wants to merge 4 commits intomainfern-api/fern:mainfrom

devin/1765161130-fix-hyphenated-header-property-accessfern-api/fern:devin/1765161130-fix-hyphenated-header-property-accessCopy head branch name to clipboard