Brew: 4.6.12 Release

<!-- Release notes generated using configuration in .github/release.yml at main -->

What's Changed

• Improve superenv mixing newer LLVM headers with Apple libc++ by @cho-m in https://github.com/Homebrew/brew/pull/20653
• feat: reinstall pkgconf automatically on macOS version mismatch by @naboyu in https://github.com/Homebrew/brew/pull/20674
• rubocops/components_order: skip fails_with inside on_system by @cho-m in https://github.com/Homebrew/brew/pull/20688
• global brewfile location defaults to user conf dir by @rrotter in https://github.com/Homebrew/brew/pull/20683
• github_runner_matrix: update GitHub Actions runners by @carlocab in https://github.com/Homebrew/brew/pull/20691
• Use new GitHub Actions macOS Tahoe (26) runner by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20690
• extend/pathname: fix signature of install_metafiles by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20693
• Add --force switch for contributions command by @dduugg in https://github.com/Homebrew/brew/pull/20694
• extend/os/mac/reinstall: fix pkgconf reinstall by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20692
• Enable recursive typechecking in specs by @dduugg in https://github.com/Homebrew/brew/pull/20644
• cask/audit: always run min_os audit by @bevanjkay in https://github.com/Homebrew/brew/pull/20695
• Revert "Enable recursive typechecking in specs" by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20704
• cmd/update-report: fix type by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20705
• dev-cmd/contributions: remove --force flag. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20701
• brew bundle: fix oldname handling. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20709
• cmd/update-report: fix an "unsupported key" error by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20711
• compilers: prioritise LLVM clang over GCC on macOS by @cho-m in https://github.com/Homebrew/brew/pull/20696
• test/github_runner_matrix: prevent dropping supported macOS versions from CI by @carlocab in https://github.com/Homebrew/brew/pull/20714
• Portable Ruby 3.4.6 by @p-linnane in https://github.com/Homebrew/brew/pull/20713
• extend/ENV/std: fix llvm_clang usage in stdenv by @cho-m in https://github.com/Homebrew/brew/pull/20715
• extend/ENV/super: default to -O2 with GCC by @cho-m in https://github.com/Homebrew/brew/pull/20716
• Migrate Linux CI to GCC 12 by @cho-m in https://github.com/Homebrew/brew/pull/20609
• dev-cmd/contributions: fix zero nil check. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20717
• Fix keg relocation for Homebrew-created files to ensure proper bottling by @Copilot in https://github.com/Homebrew/brew/pull/20657
• chore: switch cask-ci-matrix to cask methods by @SMillerDev in https://github.com/Homebrew/brew/pull/20720
• cmd/shellenv: fix for tcsh by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20725
• caveats: suggest setting CMAKE_PREFIX_PATH when appropriate by @carlocab in https://github.com/Homebrew/brew/pull/20606
• Load casks from internal API by @Rylan12 in https://github.com/Homebrew/brew/pull/20726
• Bump the "all" group with 3 updates across multiple ecosystems by @dependabot[bot] in https://github.com/Homebrew/brew/pull/20727
• cask/dsl: add some Sorbet types. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20728
• Migrate Homebrew/command-not-found to Homebrew/brew by @Rylan12 in https://github.com/Homebrew/brew/pull/20730
• Fix attestation check timing with concurrent downloads by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20731
• workflows/pkg-installer: restore Intel testing by @p-linnane in https://github.com/Homebrew/brew/pull/20736
• various: migrate Intel to Sequoia by @p-linnane in https://github.com/Homebrew/brew/pull/20737
• Npm: fetch latest version from registry.npmjs.org by @samford in https://github.com/Homebrew/brew/pull/20734
• dev-cmd/bottle: fix relocatable bottling for GCC and Binutils on Linux by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20738
• Update executables.txt in brew update when needed by @Rylan12 in https://github.com/Homebrew/brew/pull/20739
• command-not-found-init: match fish init behavior to *sh by @gromgit in https://github.com/Homebrew/brew/pull/20741
• Fix Cask download symlink creation errors due to long filenames by @Copilot in https://github.com/Homebrew/brew/pull/20718
• Remove mentions of qlplugin artifact in documentation by @Mick235711 in https://github.com/Homebrew/brew/pull/20744
• Revert "Merge pull request #20713 from Homebrew/portable-ruby-3.4.6" by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20747
• download_queue: restore Interrupt handling by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20746

New Contributors

• @naboyu made their first contribution in https://github.com/Homebrew/brew/pull/20674
• @Mick235711 made their first contribution in https://github.com/Homebrew/brew/pull/20744

Full Changelog: https://github.com/Homebrew/brew/compare/4.6.11...4.6.12