chore: update CHANGELOG.md

CHANGELOG.md

@@ -1,5 +1,75 @@
 # Changelog
 
+## [1.27.0] - 2024-01-29
+
+This long-awaited Rustup release has gathered all the new features and fixes since April 2023.
+These changes have greatly improved Rustup's maintainability, user experience, compatibility and documentation quality.
+
+The headlines of this release are:
+- Basic support for `fish` shell has been added.
+- Rustup now uses `clap` v4 for argument parsing.
+- Support and build test for `loongarch64-unknown-linux-gnu` has been added.
+- The project has introduced GitHub Merge Queue as part of its workflow, and the CI pipeline has been revamped accordingly.
+
+Also, the project seems to have attracted a substantial number of new contributors within this release cycle. Looking forward to seeing you again in the future!
+
+### Added
+
+- Add basic support for `fish` shell #3108 
+- Add the `RUSTUP_TERM_COLOR` environment variable to force the use of colored output #3435
+- Improve `rustup-init.sh`'s compatibility with `ksh` and `zsh` #3475
+- Add a warning when running under Rosetta 2 #3068
+- Add browser detection for RISC-V 64 platform #3642
+- Add a warning when removing the last/host target for a toolchain #3637
+
+### Changed
+
+- Upgrade `clap` to v4 #3444
+- Fix incorrect platform detection on macOS aarch64 due to Rosetta 2 #3438
+- Fix incorrect platform detection on 32-bit Linux userland with a 64-bit kernel #3488 #3490
+- Improve Windows system32 DLL loading mechanism #3493
+- Improve suggestions about missing components #3453
+- Fix handling of toolchain names with special characters #3518
+- Fix panic in `component list --toolchain stable` #3548
+- Rename `llvm-tools-preview` component to `llvm-tools` #3578
+
+Thanks go to:
+
+- Anthony Perkins (acperkins)
+- Tianqi (airstone42)
+- Alex Gaynor (alex)
+- Alex Hudspith (alexhudspith)
+- Alan Somers (asomers)
+- Burak Emir (burakemir)
+- Chris Denton (ChrisDenton)
+- cui fliter (cuishuang)
+- Dirkjan Ochtman (djc)
+- Dezhi Wu (dzvon)
+- Eric Swanson (ericswanson-dfinity)
+- Prikshit Gautam (gautamprikshit1)
+- hev (heiher)
+- 二手掉包工程师 (hi-rustin)
+- Kamila Borowska (KamilaBorowska)
+- klensy (klensy)
+- Jakub Beránek (Kobzol)
+- Kornel (kornelski)
+- Matt Harding (majaha)
+- Mathias Brossard (mbrossard)
+- Christian Thackston (nan60)
+- Olivier Lemasle (olivierlemasle)
+- Chih Wang (ongchi)
+- Pavel Roskin (proski)
+- rami3l (rami3l)
+- Robert Collins (rbtcollins)
+- Sandesh  Pyakurel (Sandesh-Pyakurel)
+- Waffle Maybe (WaffleLapkin)
+- Jubilee (workingjubilee)
+- WÁNG Xuěruì (xen0n)
+- Yerkebulan Tulibergenov (yerke)
+- Renovate Bot (renovate)
+
+**Full Changelog**: https://github.com/rust-lang/rustup/compare/1.26.0...1.27.0
+
 ## [1.26.0] - 2023-04-05
 
 This version of Rustup involves a significant number of internal refactors, both in terms