build(deps): bump the astro group with 3 updates

Bumps the astro group with 3 updates: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro), [@astrojs/mdx](https://github.com/withastro/astro/tree/HEAD/packages/integrations/mdx) and [@astrojs/sitemap](https://github.com/withastro/astro/tree/HEAD/packages/integrations/sitemap).


Updates `astro` from 4.8.6 to 4.9.2
- [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/[email protected]/packages/astro)

Updates `@astrojs/mdx` from 3.0.0 to 3.0.1
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/mdx/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/[email protected]/packages/integrations/mdx)

Updates `@astrojs/sitemap` from 3.1.4 to 3.1.5
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/sitemap/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/[email protected]/packages/integrations/sitemap)

---
updated-dependencies:
- dependency-name: astro
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: astro
- dependency-name: "@astrojs/mdx"
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: astro
- dependency-name: "@astrojs/sitemap"
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: astro
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "@astrojs/vercel": "7.6.0",
     "@urql/core": "5.0.3",
-    "astro": "4.8.6",
+    "astro": "4.9.2",
     "date-fns": "3.6.0"
   },
   "eslintIgnore": [
@@ -33,9 +33,9 @@
   "devDependencies": {
     "@astrojs/check": "0.7.0",
     "@astrojs/markdown-remark": "5.1.0",
-    "@astrojs/mdx": "3.0.0",
+    "@astrojs/mdx": "3.0.1",
     "@astrojs/rss": "4.0.6",
-    "@astrojs/sitemap": "3.1.4",
+    "@astrojs/sitemap": "3.1.5",
     "@astrojs/tailwind": "5.1.0",
     "@graphql-codegen/cli": "5.0.2",
     "@graphql-codegen/introspection": "4.0.3",