fix(cli): let sync throw in check (#12726)

.changeset/twenty-keys-divide.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes a case where failing content entries in `astro check` would not be surfaced

packages/astro/src/cli/check/index.ts

@@ -31,11 +31,7 @@ export async function check(flags: Flags) {
 		// NOTE: In the future, `@astrojs/check` can expose a `before lint` hook so that this works during `astro check --watch` too.
 		// For now, we run this once as usually `astro check --watch` is ran alongside `astro dev` which also calls `astro sync`.
 		const { default: sync } = await import('../../core/sync/index.js');
-		try {
-			await sync(flagsToAstroInlineConfig(flags));
-		} catch (_) {
-			return process.exit(1);
-		}
+		await sync(flagsToAstroInlineConfig(flags));
 	}
 
 	const { check: checker, parseArgsAsCheckConfig } = checkPackage;