Bump astro from 5.12.9 to 5.16.3

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.12.9 to 5.16.3.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/astro@5.16.3/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.16.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

packages/astro-integration/package.json

@@ -26,7 +26,7 @@
 		"typecheck": "tsc --noEmit"
 	},
 	"devDependencies": {
-		"astro": "5.12.9",
+		"astro": "5.16.3",
 		"publint": "0.3.12",
 		"tsdown": "0.14.2",
 		"typescript": "5.9.2"

playground/package.json

@@ -10,7 +10,7 @@
     "astro": "astro"
   },
   "dependencies": {
-    "astro": "5.12.9",
+    "astro": "5.16.3",
     "astro-integration": "workspace:*"
   },
   "devDependencies": {