fix(ci): update goreleaser to use --clean flag

[JeyJeyGao]

Fix:

• replace --rm-dist with --clean

Goreleaser was updated to v6.0.0 in #962. However the flag --rm-dist was deprecated in the latest version. Please see the details in the official document: https://goreleaser.com/deprecations/#-rm-dist

Test:

• the test release was successful: https://github.com/JeyJeyGao/notation/actions/runs/9460066788/job/26058225155

Signed-off-by: Junjie Gao junjiegao@microsoft.com

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.34%. Comparing base (f8a279c) to head (aae61f4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #964 +/- ## ======================================= Coverage 71.34% 71.34% ======================================= Files 45 45 Lines 2174 2174 ======================================= Hits 1551 1551 Misses 429 429 Partials 194 194 ```

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