Bump @astrojs/vercel from 7.3.6 to 7.4.0

Bumps [@astrojs/vercel](https://github.com/withastro/astro/tree/HEAD/packages/integrations/vercel) from 7.3.6 to 7.4.0.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/vercel/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/vercel@7.4.0/packages/integrations/vercel)

---
updated-dependencies:
- dependency-name: "@astrojs/vercel"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -17,7 +17,7 @@
     "@astrojs/react": "3.1.0",
     "@astrojs/sitemap": "3.1.1",
     "@astrojs/tailwind": "5.1.0",
-    "@astrojs/vercel": "7.3.6",
+    "@astrojs/vercel": "7.4.0",
     "@fontsource/inter": "^5.0.17",
     "@vercel/speed-insights": "1.0.10",
     "astro": "4.5.5",