Homebrew/brew 4.3.21 on GitHub

What's Changed

Implement concurrent downloads in brew fetch. by @reitermarkus in #17756
Fix macOS update-test name by @dduugg in #18295
os/mac/pkgconfig/15: drop NTLM_WB reference in libcurl by @Bo98 in #18297
linkage_checker: skip broken linkage in Julia by @cho-m in #18235
Enable strict typing in FormulaInstaller by @dduugg in #18290
shellenv: silence errors from writing to HOMEBREW_PATHS_FILE by @carlocab in #18302
github_runner_matrix: decouple macOS versions from MacOSVersion#supported_release? by @carlocab in #18306
Set correct tap when loading installed casks by @Rylan12 in #17823
Make Sequoia supported by @fxcoudert in #18296
formula: update CMake log files by @carlocab in #18307
Include formula name in no-URL error by @Rylan12 in #18308
shims/super/cc: fix linker flag parsing by @carlocab in #18309
ENV/super: replace m4 shim with M4 variable by @cho-m in #18310
formula: make cargo respect Homebrew-managed parallelism by @carlocab in #18312
exceptions: skip #fetch_issues is HOMEBREW_NO_BUILD_ERROR_ISSUES is set by @carlocab in #18313
shellenv.sh / fish shell: Move Brew PATHs to front if they exist (add -m arg to fish_add_path) by @WinkelCode in #18304

Full Changelog: 4.3.20...4.3.21