Log Message:
gleam: update to version 1.2.1

Changelog:

## v1.2.1 - 2024-05-30

### Bug Fixes

- Fixed a bug where the compiler could fail to detect modules that would clash
  with Erlang modules.
  ([Louis Pilfold](https://github.com/lpil))

- Fixed a bug where dependency version resolution could crash for certain
  release candidate versions.
  ([Marshall Bowers](https://github.com/maxdeviant))

- Fixed a bug where trailing comments would be moved out of a bit array.
  ([Giacomo Cavalieri](https://github.com/giacomocavalieri))