docs(new-release): Document `sdkName` for craft

[github-actions]

Note

The pull request "docs(new-release): Document sdkName for craft" was created by @s1gr1d but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

Small addition to this PR: #19731

Reference (adds sdkName): getsentry/craft#769

[linear-code]

JS-1911