fix: invoke vite.build with up to date configuration during astro:bui…

…ld:setup hook when target is "client" (#12763)

Co-authored-by: Alberto Matías <[email protected]>

.changeset/heavy-dots-sip.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixed changes to vite configuration made in the astro:build:setup integration hook having no effect when target is "client"

packages/astro/src/core/build/static-build.ts

@@ -283,15 +283,15 @@ async function clientBuild(
 		base: settings.config.base,
 	};
 
-	await runHookBuildSetup({
+	const updatedViteBuildConfig = await runHookBuildSetup({
 		config: settings.config,
 		pages: internals.pagesByKeys,
 		vite: viteBuildConfig,
 		target: 'client',
 		logger: opts.logger,
 	});
 
-	const buildResult = await vite.build(viteBuildConfig);
+	const buildResult = await vite.build(updatedViteBuildConfig);
 	return buildResult;
 }