fix(windows): make process.env case-insensitive (#8578)

* yay!!!!!!

* [autofix.ci] apply automated fixes

* ok

* do not use reflect here

* ok

* [autofix.ci] apply automated fixes

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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

src/string_immutable.zig

@@ -5312,7 +5312,6 @@ pub fn convertUTF16toUTF8InBuffer(
     input: []const u16,
 ) ![]const u8 {
     // See above
-
     if (input.len == 0) return &[_]u8{};
     const result = bun.simdutf.convert.utf16.to.utf8.le(input, buf);
     // switch (result.status) {