chore(ci): Fix "Gatbsy" typo in issue package label workflow

[github-actions]

Note

The pull request "chore(ci): Fix "Gatbsy" typo in issue package label workflow" was created by @chargome but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

The workflow that auto-labels issues based on SDK package name had a typo mapping @sentry/gatsby to "Gatbsy" instead of "Gatsby".

[linear-code]

JS-1976