build(deps): bump astro in the npm_and_yarn group across 1 directory

Bumps the npm_and_yarn group with 1 update in the / directory: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro).


Updates `astro` from 5.7.10 to 5.15.9
- [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@5.15.9/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.15.9
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

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

Author: dependabot[bot]

demos/package.json

@@ -9,7 +9,7 @@
     "preview": "astro preview"
   },
   "dependencies": {
-    "astro": "^5.7.4"
+    "astro": "^5.15.9"
   },
   "devDependencies": {
     "@tweakpane/core": "2.0.5",