Fix makeGitManager call in test after Effect.fn refactor

makeGitManager was changed from an Effect (Effect.gen) to a function
(Effect.fn), but GitManager.test.ts still called makeGitManager.pipe(...)
instead of makeGitManager().pipe(...). This would crash at runtime since
plain functions don't have a .pipe method.

Author: cursoragent

apps/server/src/git/Layers/GitManager.test.ts

@@ -525,7 +525,7 @@ function makeManager(input?: {
     serverSettingsLayer,
   ).pipe(Layer.provideMerge(NodeServices.layer));
 
-  return makeGitManager.pipe(
+  return makeGitManager().pipe(
     Effect.provide(managerLayer),
     Effect.map((manager) => ({ manager, ghCalls })),
   );