chore(deps): bump the npm_and_yarn group across 3 directories with 5 updates

Bumps the npm_and_yarn group with 2 updates in the / directory: [lodash](https://github.com/lodash/lodash) and [yaml](https://github.com/eemeli/yaml).
Bumps the npm_and_yarn group with 1 update in the /cookbook/copilot-sdk/nodejs/recipe directory: [esbuild](https://github.com/evanw/esbuild).
Bumps the npm_and_yarn group with 1 update in the /website directory: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro).


Updates `lodash` from 4.17.21 to 4.18.1
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.21...4.18.1)

Updates `yaml` from 2.8.1 to 2.9.0
- [Release notes](https://github.com/eemeli/yaml/releases)
- [Commits](https://github.com/eemeli/yaml/compare/v2.8.1...v2.9.0)

Updates `esbuild` from 0.27.2 to 0.28.1
- [Release notes](https://github.com/evanw/esbuild/releases)
- [Changelog](https://github.com/evanw/esbuild/blob/main/CHANGELOG-2025.md)
- [Commits](https://github.com/evanw/esbuild/compare/v0.27.2...v0.28.1)

Updates `astro` from 6.1.9 to 6.4.6
- [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@6.4.6/packages/astro)

Updates `devalue` from 5.7.1 to 5.8.1
- [Release notes](https://github.com/sveltejs/devalue/releases)
- [Changelog](https://github.com/sveltejs/devalue/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/devalue/compare/v5.7.1...v5.8.1)

---
updated-dependencies:
- dependency-name: lodash
  dependency-version: 4.18.1
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: yaml
  dependency-version: 2.9.0
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: esbuild
  dependency-version: 0.28.1
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: astro
  dependency-version: 6.4.6
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: devalue
  dependency-version: 5.8.1
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

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

website/package.json

@@ -20,7 +20,7 @@
   "dependencies": {
     "@astrojs/sitemap": "^3.7.2",
     "@astrojs/starlight": "^0.38.4",
-    "astro": "^6.1.9",
+    "astro": "^6.4.6",
     "choices.js": "^11.2.2",
     "front-matter": "^4.0.2",
     "gray-matter": "^4.0.3",