Bump externals/sgdk from 617e3cb to 1e1a640 (#555)

Bumps [externals/sgdk](https://github.com/Stephane-D/SGDK) from `617e3cb` to `1e1a640`.
- [Release notes](https://github.com/Stephane-D/SGDK/releases)
- [Commits](Stephane-D/SGDK@617e3cb...1e1a640)

---
updated-dependencies:
- dependency-name: externals/sgdk
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>