fix: make <build> route exclusion rule only exclude static assets (#13411)

* make `<build>` route exclusion rule only exclude static assets

* Update .changeset/chilled-timers-give.md

---------

Co-authored-by: Tee Ming <[email protected]>

Author: Begad666

.changeset/chilled-timers-give.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-cloudflare': patch
+---
+
+fix: exclude the dynamic route `/_app/env.js` from the adapter config `routes.exclude` special value `<build>` 

packages/adapter-cloudflare/index.js

@@ -127,7 +127,7 @@ function get_routes_json(builder, assets, { include = ['/*'], exclude = ['<all>'
 		.flatMap((rule) => (rule === '<all>' ? ['<build>', '<files>', '<prerendered>'] : rule))
 		.flatMap((rule) => {
 			if (rule === '<build>') {
-				return `/${builder.getAppPath()}/*`;
+				return [`/${builder.getAppPath()}/immutable/*`, `/${builder.getAppPath()}/version.json`];
 			}
 
 			if (rule === '<files>') {