ci: install Goreleaser to fix the release workflow

[suzuki-shunsuke]

The release v0.1.14 failed due to the lack of GoReleaser.

https://github.com/mvisonneau/s5/releases/tag/v0.1.14

The release workflow failed.

https://github.com/mvisonneau/s5/actions/runs/11068634866/job/30754500864

Run make release
mkdir -p /home/runner/.cache/snapcraft/download
mkdir -p /home/runner/.cache/snapcraft/stage-packages
git tag -d edge
Deleted tag 'edge' (was 76[9](https://github.com/mvisonneau/s5/actions/runs/11068634866/job/30754500864#step:11:10)6960)
goreleaser release --clean
make: goreleaser: No such file or directory
make: *** [Makefile:39: release] Error [12](https://github.com/mvisonneau/s5/actions/runs/11068634866/job/30754500864#step:11:13)7
Error: Process completed with exit code 2.

GoReleaser was removed by this commit. a054bbd
I'm not sure why you removed GoReleaser, but GoReleaser is still necessary to release.

[mvisonneau]

oh indeed, thanks a ton @suzuki-shunsuke 🙇 !

[coveralls]

coverage: 46.573%. remained the same
when pulling bfb7798 on suzuki-shunsuke:ci-install-goreleaser
into 7696960 on mvisonneau:main.