zigup not works with https_proxy #191
Description
$ https_proxy=http://127.0.0.1:7890 zigup fetch master
...
error: could not download 'https://ziglang.org/download/index.json':
the HTTP server replied with unsuccessful response '400 Bad Request'
$ uname -a
Darwin bogon 24.6.0 Darwin Kernel Version 24.6.0: Mon Jul 14 11:30:34 PDT 2025;
root:xnu-11417.140.69~1/RELEASE_ARM64_T8103 arm64
related to ziglang/zig#19878 ?