Bump tsdown from 0.12.0 to 0.13.0

Bumps [tsdown](https://github.com/rolldown/tsdown) from 0.12.0 to 0.13.0.
- [Release notes](https://github.com/rolldown/tsdown/releases)
- [Commits](rolldown/tsdown@v0.12.0...v0.13.0)

---
updated-dependencies:
- dependency-name: tsdown
  dependency-version: 0.13.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/astro-integration/package.json

@@ -28,7 +28,7 @@
 	"devDependencies": {
 		"astro": "5.7.13",
 		"publint": "0.3.12",
-		"tsdown": "0.12.0",
+		"tsdown": "0.13.0",
 		"typescript": "5.8.3"
 	},
 	"peerDependencies": {