test(metro-config): fix logical merge conflict breaking build (#3272)

TypeScript 5.5.4 and this test got merged simultaneously so the type
error was never caught on CI.

.changeset/fast-lizards-talk.md

@@ -0,0 +1,2 @@
+---
+---

packages/metro-config/test/expoConfig.test.ts

@@ -30,7 +30,7 @@ describe("applyExpoWorkarounds()", () => {
 
     ok("resolveRequest" in config.resolver);
 
-    applyExpoWorkarounds(config, {});
+    applyExpoWorkarounds(config as MetroConfig, {});
 
     ok(!("resolveRequest" in config.resolver));
   });