feat: skew protection (#8188)

Co-authored-by: Sarah Rainsberger <[email protected]>

src/content/docs/en/guides/integrations-guide/vercel.mdx

@@ -353,6 +353,27 @@ export default defineConfig({
 });
 ```
 
+### `skewProtection`
+
+**Type:** `boolean`<br/>
+**Available for:** Serverless
+<Since pkg="@astrojs/vercel" v="7.6.0" />
+
+Use this property to enable [Vercel Skew protection](https://vercel.com/docs/deployments/skew-protection) (available with Vercel Pro and Enterprise accounts).
+
+```js title="astro.config.mjs" ins={8}
+import { defineConfig } from 'astro/config';
+import vercel from '@astrojs/vercel/serverless';
+
+export default defineConfig({
+// ...
+  output: "server",
+  adapter: vercel({
+    skewProtection: true
+  }),
+});
+```
+
 ### Function bundling configuration
 
 The Vercel adapter combines all of your routes into a single function by default.