update theme path references in tests

packages/shared/src/theme.test.ts

@@ -5,7 +5,7 @@ import {describe, expect, it} from 'vitest';
 
 const themePath = path.resolve(
   process.cwd(),
-  'packages/shared/src/platform-theme.css',
+  'packages/shared/src/theme.css',
 );
 
 function getCssBlock(source: string, selector: string) {

src/index.test.ts

@@ -9,7 +9,7 @@ function readIndexCss() {
 
 function readPlatformThemeCss() {
   return fs.readFileSync(
-    path.resolve(process.cwd(), 'packages/shared/src/platform-theme.css'),
+    path.resolve(process.cwd(), 'packages/shared/src/theme.css'),
     'utf8',
   );
 }